CHE 205

$200

$200

$200

$200

$200

$400

$400

$400 $400

$400

$600

$600

$600

$600

$800

$800$800

$800

$800

$1000

$1000

$1000

$1000

Units and Units and LinearizationLinearization

MW and SGMW and SG Pressure Pressure and and

ManometerManometerss

Flowcharts Flowcharts and DOFand DOF

BalancesBalances

$600

$1000

What are the units of the What are the units of the constant in the following constant in the following

equation:equation:

b = 0.08664 R * T / Pb = 0.08664 R * T / P

wherewhere b(L/mol),b(L/mol), P(atm),P(atm), T(K),T(K),

R(L*atm/mol*K)R(L*atm/mol*K)

What is the linearized What is the linearized form of the following form of the following

equation?equation?

(y+2)(y+2)22 = (sin x / nx) = (sin x / nx)22 + + bb

What type of relationship What type of relationship is the following equation is the following equation and which axes would be and which axes would be necessary in order for the necessary in order for the

plot of C vs. R to be a plot of C vs. R to be a straight line?straight line?

C = m*RC = m*Rbb

If an exponential curve If an exponential curve fits the points (2.3, 20) fits the points (2.3, 20) and (7.6, 476), what are and (7.6, 476), what are the slope and intercept the slope and intercept

of the semi-log plot?of the semi-log plot?

What are the slope and What are the slope and intercept (with units) of intercept (with units) of the following power law the following power law

relationship:relationship:

P(atm) = a*x(N)P(atm) = a*x(N)bb

What is the definition of What is the definition of molecular weight?molecular weight?

What is the definition of What is the definition of specific gravity?specific gravity?

If an object sinks in a If an object sinks in a container of water, what can container of water, what can you say about its density and you say about its density and

specific gravity?specific gravity?

What is the average molecular What is the average molecular weight of a equimolar mixture weight of a equimolar mixture

of benzene, toluene, and of benzene, toluene, and xylene?xylene?

What is the average What is the average molecular weight of a molecular weight of a mixture with 20 wt% mixture with 20 wt%

ethane, 35 wt% butane, 15 ethane, 35 wt% butane, 15 wt% hexane, and the rest wt% hexane, and the rest

octane?octane?

If an open tank has 30 ft of If an open tank has 30 ft of water standing in it, what is water standing in it, what is the gauge pressure (in atm) the gauge pressure (in atm) at the bottom of the tank?at the bottom of the tank?

If an open tank has 25 in of If an open tank has 25 in of mercury standing in it, what mercury standing in it, what is the absolute pressure (in is the absolute pressure (in

bar) at the bottom of the bar) at the bottom of the tank?tank?

What is the gauge pressure What is the gauge pressure in a closed tank if the in a closed tank if the

absolute pressure is 12.5 absolute pressure is 12.5 psi?psi?

What is the height of a What is the height of a liquid (SG = 0.92) in an liquid (SG = 0.92) in an open tank if the gauge open tank if the gauge

pressure at the bottom of pressure at the bottom of the tank is 225 kPa?the tank is 225 kPa?

What is the pressure at the What is the pressure at the top of a closed tank if it top of a closed tank if it

contains a liquid at a height contains a liquid at a height of 28 m (SG = 0.92) and the of 28 m (SG = 0.92) and the

gauge pressure at the gauge pressure at the bottom of the tank is 225 bottom of the tank is 225

kPa?kPa?

What is missing from the What is missing from the following flowchart?following flowchart?

100 kg100 kg

0.3 kg A/kg0.3 kg A/kg

0.7 kg B/kg0.7 kg B/kg

mm11 (kg)(kg)


0.8 kg C/kg0.8 kg C/kg

xx11 kg A/kg kg A/kg

xx22 kg B/kg kg B/kg

Complete the following Complete the following flowchart using only flowchart using only

variables (do not solve)variables (do not solve)50 kg A/s50 kg A/s

75 kg /s75 kg /s

0.4 kg 0.4 kg B/kgB/kg

0.6 kg 0.6 kg C/kgC/kg

0.6 kg 0.6 kg A/kgA/kg



0.8 kg 0.8 kg C/kgC/kg



Determine the number of Determine the number of Degrees of Freedom in the Degrees of Freedom in the

following systemfollowing system

35 lb35 lbmm

xx11 lb lbmm A/lb A/lbmm

(1-x(1-x11) lb) lbmm B/lb B/lbmm

mm11 (lb (lbmm))

20 lb20 lbmm

0.45 lb0.45 lbmm A/lb A/lbmm

0.55 lb0.55 lbmm B/lb B/lbmm

0.85 lb0.85 lbmm A/lb A/lbmm

0.15 lb0.15 lbmm B/lb B/lbmm

Determine the number of Determine the number of Degrees of Freedom in the Degrees of Freedom in the

overall systemoverall system50 kg 50 kg A/sA/s

mmoo kg /s kg /s




(1-x(1-x11) kg ) kg B/kgB/kg





mm11 kg /s kg /s

mm33 kg /s kg /s

mm44 kg /s kg /s

mm22 kg /s kg /s



(1-x(1-x22-x-x33) kg ) kg C/kgC/kg

What is the number of Degrees of What is the number of Degrees of Freedom in the first separator for Freedom in the first separator for

the following system?the following system?

5000 5000 gg

mm11 (g) (g)

mm22 (g) (g)mm44 (g) (g)

3500 3500 gg

mm33 (g) (g)

0.25 g 0.25 g A/gA/g

0.35 g 0.35 g B/gB/g

0.40 g 0.40 g C/gC/g

0.45 g 0.45 g B/gB/g

0.55 g 0.55 g C/gC/g

0.60 g 0.60 g A/gA/g

0.25 g 0.25 g B/gB/g

0.15 g 0.15 g C/gC/g

xx11 g A/g g A/g

(1-x(1-x11) g ) g B/gB/gxx22 g A/g g A/g

(1-x(1-x22) g ) g B/gB/g

xx33 g A/g g A/g

(1-x(1-x33) g ) g B/gB/g

How many balances are How many balances are independent in the independent in the following system?following system?

100 kg100 kg



mm11 (kg)(kg)






mm22 (kg)(kg)

Please write the balance on Please write the balance on B in the following system:B in the following system:

100 kg100 kg



mm11 (kg)(kg)






mm22 (kg)(kg)

What is the mathematical What is the mathematical expression that represents expression that represents

the following statement: the the following statement: the feed ratio of A to B is 2:1?feed ratio of A to B is 2:1?

mmAA (kg) (kg)

mmBB (kg) (kg)

mm11 (kg) (kg)


(1-x(1-x11) kg B/kg) kg B/kg

Write the mathematical Write the mathematical expression that represents the expression that represents the statement – 70% of the water is statement – 70% of the water is stripped from the feed solution stripped from the feed solution and sent to a processing plantand sent to a processing plant

mmoo (kg) (kg)

mm11 (kg H (kg H22O)O)

mm22 (kg) (kg)


(1-x(1-x22) kg ) kg HH22O/kgO/kg


(1-x(1-x11) kg ) kg HH22O/kgO/kg

To processing To processing plantplant

What is the total molar amount What is the total molar amount of the overhead product (mof the overhead product (mOO) )

if 93% of A is recovered in if 93% of A is recovered in this stream?this stream?

200 mol200 mol

mmBB (mol)(mol)

mmOO (mol) (mol)

0.95 mol 0.95 mol A/molA/mol

0.05 mol 0.05 mol B/molB/mol

0.5 mol A/mol0.5 mol A/mol

0.5 mol B/mol0.5 mol B/mol

xx11 mol A/mol mol A/mol

(1-x(1-x11) mol ) mol B/molB/mol

CHE 205

Documents

Transcript of CHE 205