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Transcript of Pathways NOV
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8/3/2019 Pathways NOV
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From EDITOR
Dear Readers,
Thank you for your immense support and contri-
bution for our first issue of pathways. We are
happy to see your interest and enthusiasm in the
magazine.
With your constant motivation and support, we
strive for the betterment with every issue.
With the rise in catastrophic oil spills in oceans,
weve got the cover story on it, unraveling the sci-
ence behind oil spills and its preventive measures.
And this is the time when most of the pre-final
year students are geared up for CAT! Hence a spe-
cial feature on the effective study for CAT has been
included.
Also, other articles presented are sure to intrigue
your technical and creative mind. We wish it ca-
talyses your technical quest.
We welcome your feedback for the improvement
of the magazine!
Happy reading!!
Editor
Sindhu Balu
Editorial Team
Chaparala Sree Vidya
Purnima Naresh Mangnani
Vikram Gowrishankar
Maya.P.S
Joint Editorial Team
Hemalatha.J
Nivethika Sundararajan
N.Vinisha
Mehdi Ali Mirza
V.P.Venkateshwaran
Rohit Chanchal
Cover Design
Prasanna Venkatesh.K
-Sindhu BaluFinal Year
ChemE
EDITORIAL BOARD
Reach us at:
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1
INSIDE
How bad is oil spill?!
Pg. 3
So you think you can get into IIM?!
Pg.6
Elements revealed!
Pg.9
Curious mind!!
Pg.7
With Regards, ChemE
Pg.12
FEATURES
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How Bad is oil spill?An oil spill is the accidental petroleum release into the environment. On land oil spills are usually
localized and thus their impact can be eliminated relatively easily. In contrast, marine oil spills may resultin oil pollution over large areas and present serious environmental hazards. The primary source of acci-dental oil input into seas is associated with oil transportation by tankers and pipelines (about 70%),whereas the contribution of offshore drilling and production activities is minimal (less than 1%). Large andcatastrophic spills releasing more than 30,000 tons of oil are relatively rare events and their frequency inrecent decades has decreased perceptibly. Yet, such episodes have the potential to cause the most seri-ous ecological risk (primarily for sea birds and mammals) and result in long-term environmental distur-bances (mainly in coastal zones) and economic impact on coastal activities (especially on fisheries andmariculture).
COVER STORY
-KISHEN RAFIZ
Final yr, ChemE
Public concern over marine oil spills has
been clearly augmented since the 1967
Torrey Canyon supertanker accident
off the UK coast, when 100,000 tones of
spilled oil caused heavy pollution of the
French and British shores with serious
ecological and fisheries consequences.
More recently, the highly publicized1989 spill of the Exxon Valdez in Prince
William Sound, Alaska caused unprece-
dented damage to the fragile Arctic sys-
tem. Since then, impressive technical,
political, and legal experience in manag-
ing the problem has been gained in
many countries and at the international
level, mainly through a number of Con-
ventions initiated by the International
Maritime Organization (IMO).- The oil can PELICAN
As a result of the Exxon Valdez oil spill, the U.S. passed legislation requiring all newly built tankers to havea double hull.
The Deepwater Horizon oil spill (also known as the Gulf of Mexico Oil Spill or the BP Oil Spill) is the largest
marine oil spill in history, and was caused by an explosion on the Deepwater Horizon offshore oil platform
about 50 miles southeast of the Mississippi River delta on April 20, 2010. The Deepwater Horizon sank in
about 5,000 feet (1,500 m) of water on April 22, 2010. On April 23 the U.S. Coast Guard suspended the
search for missing workers who are all presumed dead. BP was principal developer of the Macondo Pros-
pect oil field where the accident occurred.
What is an oil spill?
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Whose the dunce??
At the time of the explosion, BP and Trans-ocean were in the process of closing the well in antici-
pation of later production. Halliburton had recently completed cementing of casings in the well. The U.S.
Government named BP as the responsible party in the incident and will hold the company accountable for
all cleanup costs resulting from the oil spill. BP has accepted responsibility for the oil spill and the cleanup
costs. However, in a report issued on September 18, 2010, BP clearly indicated its view that Trans-ocean
and Halliburton deserved considerable blame for the disaster, allegations vehemently denied by those
companies. The sinking of the platform caused crude oil to gush out of the riser the 5,000-feet pipe that
connects the well at the ocean floor to the drilling platform on the surface.
The rate of oil release became the
subject of intense debate. Throughout the
first month of the spill, government re-
sponders officially adhered to what we
now know was low and inaccurate esti-
mates. Non-governmental scientists, on
the other hand, used the small amount of
publicly available flow data to generate
estimates that have proven to be much
more accurate. Live video feeds of theleak from the ocean floor fueled the con-
troversy over the magnitude of the leak.
The emerging consensus is that
roughly five million barrels of oil were
released by the Macondo well, with
roughly 4.2 million barrels pouring into
the waters of the Gulf of Mexico.
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How do we prevent???
The following points must be kept in mind by oil companies to prevent oil spills, and thus make their op-
erations safer at every level .
Inspect for deterioration and leaks in equipment
each year. On a boat, make sure all fuel lines and
hoses are in good condition and that seals and con-
nections are tight. At home, examine the oil tank,
pipes and supply lines for corrosion or over-
pressurization. Replace all the damaged parts with
new fittings.
Install an oil safety valve on the supply line of your
heating system if you do not already have one. This
will automatically shut off the oil supply if the line
breaks.
Have your oil tank cleaned out every 10 years. Wa-
ter and sludge can build up, causing corrosion and
rusting the tank from the inside out.
Replace underground tanks that are more than 12
to 15 years old with an above-ground tank. Under-
ground tanks tend to corrode more quickly than
those that are sheltered above ground. Also, re-
place your above-ground tank if it has been uncov-
ered for more than 10 years. Make sure your new
tank has a covering to protect it.
Visual Puzzles!!!First one is done for you.
BREAKFAST!! Now try the rest ! For those who are visually puzzled, reach pg.no. 7
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So you think you can get intoIIM?!-Sindhu Balu
Final yr, ChemEAiming an IIM?!
Most of the CAT aspirants might have joined some ace
coaching institutions by now and some would have
even kick started their preparation.
Last year right the same time, I underwent the same
process, the rush of joining CAT classes, scouring
around any cat material with full zest. With aspirations
in mind and spirits soaring high I presented myself for
my first class. But the first session thyself startled me.It was not a easy journey. There were not hundreds,
but thousands of students sprawling all over the area.
If seen from the bird's view, am sure the inauguration
ceremony would have resembled a swarm of bees,
with backpacks.
My class comprised of 70 people. There were 10 such
classes in one batch and in one single centre of ONE
institute. A simple calculation spotlighted on the enor-
mity of the competition and strenuousness of the jour-
ney ahead. Bell the cat!!
Why is such a strenuous process glorified?!
1. You get an highly successful career.
2. Could DEMAND a pay in 10 digits
3. Could RECTIFY any mistake IF done in UG!!
4. An MBA degree which adorns your living roomwall.
5. * Specific for boys: a FIVE fold increase in yourdowry
So if you think MBA is your way, you're reading the
right article.
Pace 1:
IIM'S are your sole dream destination. So take time to
get to know about them. Only then you would know
the amazingly wonderful world which awaits you at the
end of the hard toil. Learn about other colleges too.
XLRI, FMS, IIFT, NMIMS, TISS, MUDRA are some of the
important institutions which you can't afford to miss!
Pace 2:
Analyze yourself! The well said quote about CAT is,
'There's no shortcut to CAT'
Either you work HARD or SMART. Vast majority of us are
not blessed with the acumen or genius to take CAT and
get an call from IIM!! So it's better to prepare.
There are many online forums and websites
( e.g.www.testfunda.com) to take mock CAT and assess
your present status. Analyze using an academic SWOT.
This would enable you to devote your energy on weak
areas , enabling smarter work.
Pace 3: Here comes the million dollar question!!
Should I need to join a coaching institute?
OrCollect the reading material and study by myself?
The only solution is " YOU DECIDE"
Coaching institutions play a vital role in honing your
skills and organizing your study habits. Innumerous prac-
tice tests and ace coaching are sure to escalate your
percentile. But please do not mistake them to be alche-
mists having some supernatural powers to turn your
weaknesses into golden strengths. They provide you
the best possible steps to get yourself into IIM, provided
you follow them.
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IIM,Ahmedabad
And in best case, you find yourself capable
enough of organizing your studies all by your-
self, there can be nothing better than that.
Ultimately, you are aiming at becoming a
globally competent manager. Self manage-
ment and organization are a must here.
Pace 4: 'Plan your work and work your plan'
Simple. Yet it is the mantra for CAT. Make an
exclusive time table that is quite specific foryour IQ. Better to start from your high school
math and study from the day you keep your
eye on IIM. The more you practice, nearer
comes perfection.
Pace 5: Add food to your thought. Read, read, read and READ!!
Keep participating in GD's at the coaching classes. Also participate in online MBA forums ( e.g. www.pagalguy.com)
and get to know your competitors!
Here are our seniors who have realized their dream of IIM and share the spirit of life over there!!
IIM Bangalore is a unique place where you get
the chance to discuss real corporate problems
with 78 state toppers across boards from dif-
ferent years, play any sport you like with 45
gold medalists across IITs, NITs and Indias
Best Universities, get your doubts on statistics
clarified by a Harvard or AFMC doctor and flirt
with St.Stephens or SRCC topper. Typically the
student studies for 4 hrs for each class, the
professors prepares for 6 hours to handle the
1.5 hr session. Eating 5 times a day, bathing
once a week, drinking 7 cups of chai a day,
celebrating birthdays every night and count-
less number of times you wish 24 hours a day
is not sufficient makes IIM B definitely the
place to be. Wishing you all the very best for
CAT.
I hope this would help you all MBA aspirants in
unravelling the mysteries surrounding the
prestigious IIM. A year ago I was in your shoes,
when the idea of a B School was bizarre, but
interesting. Life here is amplified and time
seems to fly by. MBA is all about networking.
You learn to enjoy yourself, make new con-
tacts and at the end of the day you might learn
few things that come handy in life. The biggest
USP is that you meet different kinds of people
and take in their ideas. You learn how tostretch your limits and realize that, your po-
tential is much more than what you had ever
conceived it. I can speak forever on IIM but the
truth is that you can truly understand and love
this life only when you become a part of it.
Wish you very best to join this fantastic frater-
nity.
Janesh Rajagopal
PGPM,
Class of 2013
IIM,Bangalore
Aishwarya Venkataramani
PGPM,
Class of 2013
IIM, Kozhikode
So now its your turn to burn the midnight oil! Don't flaunt it, just because its in trend! Keep in mind, you need
to burn smart oil with hard toil to get there!!
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Answers for Visual Puzzles!
Answers (Left to Right):
Breakfast
Half-hearted
Moral support
A friend in need
For instanceReady for anything
Once in a blue moon
Back door
Quite right
Your time is up
Crossroads
Crossbreed
Painless operation
SummaryForgive and forget
Language Snack!
1.c ; 2.a ; 3.c ; 4.a ; 5.c ; 6.b
Curious Mind!!-Karthik SrinivasFinal Yr, ChemE
1. Why do onions make you cry?Answer: Unless you've avoided cooking, you've probably cut upan onion and experienced the burning and tearing you get fromthe vapors. When you cut an onion, you break cells, releasingtheir contents. Amino acid sulfoxides form sulfenic acids. Enzymesthat were kept separate now are free to mix with the sulfenic ac-ids to produce propanethiol S-oxide, a volatile sulfur compoundthat wafts upward toward your eyes. This gas reacts with the wa-ter in your tears to form sulfuric acid. The sulfuric acid burns,stimulating your eyes to release more tears to wash the irritantaway.Cooking the onion inactivates the enzyme, so while the smell ofcooked onions may be strong, it doesn't burn your eyes. Asidefrom wearing safety goggles or running a fan, you can keep fromcrying by refrigerating your onion before cutting it (slows reac-tions and changes the chemistry inside the onion) or by cuttingthe onion under water.The sulfur-containing compounds also leave a characteristic odoron your fingers. You may be able to remove or redu ce some of thesmell by wiping your fingers on a stainless steel odor eater. Is this possible?!
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2. Why does ice float?There are two parts to the answer for this question. First, let's
take a look at why anything floats. Then, let's examine why ice
floats on top of liquid water, instead of sinking to the bottom.
Answer: A substance floats if it is less dense, or has less mass per
unit volume, than other components in a mixture. For example, if
you toss a handful of rocks into a bucket of water, the rocks,
which are dense compared to the water, will sink. The water,
which is less dense than the rocks, will float. Basically, the rocks
push the water out of the way, or displace it. For an object to beable to float, it has to displace a weight of fluid equal to its own
weight.
Water reaches its maximum density at 4C (40F). As it cools fur-
ther and freezes into ice, it actually becomes less dense. On the
other hand, most substances are most dense in their solid
(frozen) state than in their liquid state. Water is different be-
cause of hydrogen bonding.
A water molecule is made from one oxygen atom and two hydro-
gen atoms, strongly joined to each other with covalent bonds.
Water molecules are also attracted to each other by weaker
chemical bonds (hydrogen bonds) between the positively-
charged hydrogen atoms and the negatively-charged oxygen atoms of neighboring water molecules. As water cools
below 4C, the hydrogen bonds adjust to hold the negatively charged oxygen atoms apart. This produces a crystallattice, which is commonly known as 'ice'.
Ice floats because it is about 9% less dense than liquid water. In other words, ice takes up about 9% more space than
water, so a liter of ice weighs less than a liter water. The heavier water displaces the lighter ice, so ice floats to the
top. One consequence of this is that lakes and rivers freeze from top to bottom, allowing fish to survive even when
the surface of a lake has frozen over. If ice sank, the water would be displaced to the top and exposed to the colder
temperature, forcing rivers and lakes to fill with ice and freeze solid.
3. What common chemicals shouldn't be mixed?
Some of the common chemicals found in your home shouldn't be
mixed together. It's one thing to say "don't mix bleach with ammonia",
but it's not always easy to know what products contain these two
chemicals. Here are some products you may have around the home
that shouldn't be combined. I also have a list of dangerous household
chemicals that may be helpful.
Bleach with Acid Toilet Bowl Cleaners This mixture can result in
toxic, potentially deadly fumes.
Bleach with Vinegar Vinegar is a type of acid. Toxic chlorine vapor
is produced. Don't mix chlorine bleach with any acid.
Bleach with Ammonia Toxic, potentially lethal vapors are pro-
duced. The main danger comes from chloramine vapors.
Different Brands of One Type of Product Don't mix different
cleaners together. They may react violently, produce toxins, or become
ineffective. Highly Alkaline Products with Highly Acidic Products Acids and
bases (alkalis) can react violently, presenting a splash hazard. Acids and
bases are caustic and may cause chemical burns.
Certain Disinfectants with Detergents Don't mix disinfectants with
'quaternary ammonia' listed as an ingredient with a detergent. The
effectiveness of the disinfectant may be neutralized.
Chlorine bleach is sometimes called sodium hypochlorite or
hypochlorite. You will encounter it in chlorine bleach, automatic dish
-washing detergents, chlorinated disinfectants and cleaners, chlorinated scouring powder, mildew removers, and
toilet bowl cleaners. Do not mix products together. Do not mix them with ammonia or vinegar.
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Elements revealed!!!Whether gas, liquid or solid; radioactive or stable, reactive or inert; toxic or in your vitamin pill, the 118 building
blocks each have its own chemically idiosyncratic characteristics, along with certain commonalities.
So here is a set of 10 elements revealed. Given their characteristics, guess the element!!
For all those who could not reveal it, move to pg.no. 12
1.Solid-alkali
One of only three elements to be created in the big
bang, though in much smaller amounts than hydro-
gen or helium. It has no known role in normal physiol-
ogy, but as a drug it has long been appreciated as a
mood stabilizer.
2.Solid-alkali
Together with nitrogen and phosphorus it is one of
the three crucial elements in artificial fertilizers. It is
part of the alkali column, whose name comes
from qali, the Arabic word for the salt-loving plant
saltwort.
3.Liquid-halogen
This element is a favorite of hot-tubbers because it
has sanitizing properties similar to those of chlorine
but it is not as smelly.
4.Solid-Metalloids
Its compound with fluoride is one of the most acidic
known, with a pH of -31. In alchemy it was seen as a
feminine element; its symbol later became the sym-
bol for female (a cross with a circle on top).
5.Solid-non metals
Before photosynthesis appeared, it's compound with
hydrogen may have been lifes first source of energy.
It is one of the most important elements in the living cell, appearing in two types of amino acids and in countlessother compounds.
6.Solid-transition metals
It is one of the most inert metals when in bulk. But its nano particles have surprising catalytic powers. They also as-
sume different colors depending on their size: its nano particles are responsible for the reds of stained glasses.
7.Solid-non metals
One of the crucial building blocks of DNA as well as of ATP, the living cells main form of energy currency. Together
with nitrogen compounds, they are a major pollutant in the runoff from fertilizers, causing dead zones in seas and
lakes.
8. Solid-actinides
Although he was neither a chemist nor a nuclear physicist, he was the author of a seminal 1905 paper on Brownian
motion that helped convince scientists of the existence of atoms and molecules. In the same year he also laid the
foundations for quantum theory, which eventually led scientists to explain the structure of the periodic table. it was
first discovered in materials from the fallout of a thermonuclear bomb.
9.Solid-metalloids
This element is fairly rare and has no known role in biology. Mixed in with glass, it reduces thermal expansion and
thus it makes for oven-proof pots and pans.
10.Solid- post transition metals
It is the most abundant metal in Earths crust but it is rare in its pure form. Until the 1800s, when the technology
was developed to separate it from rock, it was more expensive than gold; Napoleon III allegedly hosted a banquet in
which the guests of honor ate on its plates.
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With Regards,ChemE-Purnima Manghnani
Final Yr, ChemEWet Bulb Temperature
The wet bulb temperature is a good googly that you might have
to face in an interview. Its the interviewers favorite question
because its something that not many have a clear idea about.
Condensation, evaporation, humidification, and distillation are
transport phenomena in which vapors or vapor mixtures are in
contact with the liquids, and a large amount of energy is released
or absorbed with the phase change, which is known as the latent
heat. A characteristic of mass transfer in these phenomena is
that it is always accompanied by an energy transfer due to the
phase change, and in this respect it is quite different from ordi-
nary mass transfer, which is not accompanied by an energy
transfer.
Wet bulb temperature is important, owing to the fact that it helps in determining the humidity of the given gas
stream. Well get to that in detail later.
Say that a droplet of water is suspended in an unsaturated fast moving gas stream and its temperature is higher than
the dew point of the gas (that means on the gas-liquid interface, instead of condensation there may be vaporization
due to the higher temperature) which will facilitate a high vapor pressure at the surface of the droplet, whereas
theres a low partial pressure in the bulk gas. The latent heat required for the liquid to pass into the vapor phase will
be taken from the body of the droplet i.e. the sensible heat. Hence the vaporization will certainly cause a fall in the
droplet temperature.
As the temperature of the droplet keeps falling, once its less than the gas temperature, heat transfer from the gas to
the liquid begins. This process assures that the liquid get enough latent heat for the vaporization. At some point a
steady state will be attained where the heat received by the drop will be equal to the latent heat used for vaporiza-tion. The temperature of the drop or liquid at this point is called the wet bulb temperature.
Hence the heat transfer occurs to facilitate the mass transfer. This is a very interesting phenomenon! If there is a
driving force for mass transfer to occur, heat transfer will provide the helping hand (obviously in operations involving
phase change).
Now what exactly is the significance of the wet bulb temperature??
At steady state,
qG= w NA
where NA is the gas-phase mass flux, qG is the gas-phase sensible heat flux, and w is the latent heat of vaporization
of the liquid at the wet-bulb temperature Tw. This links the mass and heat transfer operations.
qG= hG (TG-Tw)
NA= kH (Hw-H)
where hG is the gas-phase heat transfer coefficient, kH is the gas-phase mass transfer coefficient defined by the driv-
ing force in terms of the absolute humidity, H is the absolute humidity of the bulk gas, Hw is the absolute humidity
at the wet-bulb temperature, and Tw and TG are the wet-bulb and the bulk gas temperatures, respectively.
Now lets do a little bit of mathematical manipulation and arrive at this equation,
(Hw-H)/(TG-Tw) = hG/ (kH. W)
hG/kH is the psychrometric ratio which is a physical parameter. The above equation clearly establishes a relationship
between the humidity and the temperatures. Voila!!
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Language Snack!
a) to suddenly become excited
b) to slowly become excited
c) to suddenly become angry
a) you can ask me anything you want
b) it's safe to fire the gun
c) I think I can smell something burning
What does fire away mean?:
a) you feel very brave about doing something
b) you feel too cold to do something
c) you feel too nervous to do something
If you get cold feet, this means that:
a) you can't decide
b) you have made a decision
c) you have a headache
If you are in two minds, this means:
a) very angry
b) very sad
c) very happy
If you are over the moon, how do you feel?
a) play a musical instrument
b) decide what to do when the situation happens
c) plan what to do before the situation happens.
What are you going to do if you are going toplay it by ear?
What does blow your top mean?:
Answers in pg.no. 7
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Elements revealed!!! -Solutions
1 2 3
4 5 6
987
10
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OUR MAJOR SPONSORS
Orchid Chemicals & Pharmaceuticals Ltd (Orchid) was established in 1992 as a 100% Export Ori-
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Orchid's growth and positioning in the global pharmaceutical industry are indeed distinctive. A
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Orchid is a leader in the use of environment friendly technologies. Orchid has invested substan-
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Vision
Enriching Lives through Innovation in Healthcare
Mission
"Discovery to Delivery"
Orchid is a vertically integrated pharmaceutical company with established research, manufactur-
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Today it enjoy the status of a global entity with
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dia, SRF is the world's 2nd largest manufacturer
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The multi-business corporate
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OUR PAST SPONSORS