Wednesday February 3, 2010 (Review for Test 7). No Bell Ringer Today Bell Ringer 2-3-10.
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Transcript of Wednesday February 3, 2010 (Review for Test 7). No Bell Ringer Today Bell Ringer 2-3-10.
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WednesdayWednesdayFebruary 3, 2010February 3, 2010(Review for Test 7)(Review for Test 7)
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No Bell Ringer Today
Bell RingerBell Ringer 2-3-102-3-10
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AnnouncementsAnnouncements No announcements
today.
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Assignments Currently OpenAssignments Currently OpenAssignmentAssignment PagePage Date Date
IssuedIssuedDate Into Date Into
GradeSpeedGradeSpeedLast Day Last Day to Turn Into Turn In
Notes: The Kinetic-Molecular Theory of Gases/Nature of Gases
1 1/20 1/27 2/3
WS: Introduction to Gases
7 1/21 1/28 2/4
Notes: Gases and Pressure
9 1/22 1/29 2/5
WS: Pressure 13 1/25 2/1 2/8
Notes: The Gas Laws
15 1/26 2/2 2/9
WS: Calculations Involving Gases
19 1/28 2/4 2/11
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Review for Test 7
The Kinetic Molecular Theory of Gases
The Nature of Gases
Gases and Pressure
The Gas Laws
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1The Kinetic-Molecular
Theory of Matter is based upon the idea that
particles of matter are always in motion.
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What are the five basic assumptions of the Kinetic-Molecular Theory of Gases?
2
Gases consist of large numbers of tiny particles that are far apart relative to their size.
Collisions between gas particles and between particles and container walls are elastic collisions.Gas particles are in continuous, rapid, random
motion.There are no forces of attraction or repulsion
between gas particles.The average kinetic energy of gas particles
depends on the temperature of the gas.
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3
The average kinetic energy of
gas particles depends upon the ________ of the gas.temperature
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4Gas molecules are _______________ and ______________ than the molecules in
liquids and solids.moving faster
farther apart
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5
Gas molecules will spread out and occupy their entire container
because of the property of ________.
expansion
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6List four materials that are fluids and four that are not.
Fluids Not Fluids
Any liquid or any gas.
any solid
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7What is the general trend in density of a substance as it passes through its three common phases?
The solid phase usually has the highest density, then the liquid phase, and the gas phase has the lowest
density.
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8Which phase of matter
is the most compressible, and why?The gas phase is the most
compressible, because there is empty space between gas
particles that can be squeezed out.
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9Which phase of matter
is the least compressible, and why?The solid phase is the least
compressible, because there is very little empty space between
solid particles that can be squeezed out.
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10Give a good
example of the diffusion of a gas.Examples would be gas
particles that are bounced from one place to another by molecular motion of air molecules.
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11 The force of the collisions
of gas particles against the inside walls of their
container is called _______.
pressure
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12What are the standard
conditions for gas measurements?
1 atmosphere of pressure at a
temperature of 0oC
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13450 torrs of pressure is
how many atmospheres?
0.59 atm
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145.75 atmospheres of pressure is how many kilopascals?
583 kPa
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1523.34 kilopascals of
pressure is how many atmospheres?
0.2303 atm
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162.65 × 103 atm of
pressure is how many kPa?
2.69 × 105 kPa?
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17 What is the value of
atmospheric pressure at sea level when the temperature is
0oC and the weather is neutral? Give your answer in five
different units. 760 mm Hg = 760 torr = 1 atm = 101325 Pa =
101.325 kPa
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18 The pressure exerted on a 650. mL sample of oxygen gas at constant
temperature is increased from 0.325 atm to 0.675 atm. What will the final
volume of the sample be?Law? Formula
Boyle’s P1V1 = P2V2
V2 = 313 mL
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19 A sample of oxygen gas has a volume of 660. mL at 35°C. At what temperature will its
volume be 750. mL?Law?
Formula Charles’ V1/T1 = V2/T2
T2 = 350 K
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20 A sample of nitrogen gas at 46°C
exerts a pressure of 0.645 atm. The gas is heated to 76°C at constant
volume. What will its new pressure be?
Law? Formula
Gay-Lussac P1/T1 = P2/T2
P2 = 0.706 atm
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21 A sample of fluorine gas at
17°C and 1.16 atm occupies a volume of 3.86 L. What
volume would this gas occupy at 66°C and 0.950 atm?
Law? Formula Combined P1V1/T1 = P2V2/T2
V2 = 5.50 L
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22 What pressure, in
atmospheres, is exerted by 0.440 mol of hydrogen gas in a
4.00 L container at 45°C?
Law? Formula Ideal PV = nRT
P = 2.87 atm
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23 How many moles of oxygen gas are there if the gas has a volume
of 5.60 L, a pressure of 1.75 atm, and a temperature of 35°C?
Law? Formula
Ideal PV = nRT n = 0.387 mol