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CHM 1025C: On-Line Practice Final - Long Form

Module Six: Gas Laws

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Module 6 Test Masters:

Carla Irven-Ciccone[Test Input]

John Taylor (johtaylo@fscj.edu) [Template Author]


Multiple Choice [Chapter 11]


Question 1

Which of the following is not an observed property of gases?

a) gases have a variable shape and volume
b) gases expand and fill the container
c) gases compress and eventually liquify
d) gases have a density greater than 1.00 g/mL
e) gases diffuse and mix uniformly

Question 2

The vapor pressure of methanol is 1 mm Hg at -44oC; 10 mm Hg at -16o; 100 mm Hg at 21o; 760 mm Hg at 65oC; 1520 mm Hg at 84oC. What is the normal boiling point of methanol?

a) -44oC
b) -16oC
c) 21oC
d) 65oC
e) 84oC

Question 3

Oxygen is collected over water at 25oC and 775 torr. What is the partial pressure of oxygen if the vapor pressure of water is 23.8 torr at 25oC?

a) 23.8 torr
b) 750 torr
c) 751 torr
d) 775 torr
e) 799 torr

Question 4

An atomospheric sample is composed of nitrogen, oxygen, argon, and traces of other gases. If the partial pressure of nitrogen is 587 torr, oxygen is 158 torr, and argon is 7 torr, what is the observed barametric pressure?

a) 8 torr
b) 100 torr
c) 422 torr
d) 752 torr
e) 1512 torr

Question 5

Which of the following changes increases the pressure in a gaseous system?

a) increasing the volume
b) decreasing the temperature
c) increasing the number of gas molecules
d) all of the above
e) none of the above

Question 6

a 5.00 L volume of methane gas is cooled from 60oC to 30oC. If the pressure remains constant, what is the new volume?

a) 2.50 L
b) 4.55 L
c) 5.00 L
d) 5.50 L
e) 10.0 L

Question 7

A sample of ozone gas is at 0oC. If both the volume and pressure double, what is the new Kelvin temperature?

a) 68 K
b) 135 K
c) 273 K
d) 546 K
e) 1092 K

Question 8

Which of the following is not true according to the kinetic theory of gases?

a) molecules occupy zero volume
b) molecules move randomly in straight line paths
c) molecules are not attracted to one another
d) molecules lose energy after colliding
e) molecules have the same kinetic energy at the same temperature

Question 9

What are the conditions for a real gas to behave most like an ideal gas?

a) high temperature, high pressure
b) high temperature, low pressure
c) low temperature, high pressure
d) low temperature, low pressure
e) none of the above

Question 10

What is the temperature at which an ideal gas has zero kinetic energy?

a) absolute zero
b) 0oC
c) 273oC
d) 273 K
e) -273 K

Question 11

What is the temperature at which an ideal gas occupies zero volume?

a) 0oC
b) 0 K
c) 273oC
d) 273 K
e) -273 K

Question 12

How many moles of methane occupy a volume a 2.00 L at 50oC and 0.500 atm? (R = 0.0821 atm . L/mol . K)

a) 0.0377 mol
b) 0.151 mol
c) 0.244 mol
d) 4.11 mol
e) 26.5 mol

Question 13

Which of the following laws states that the pressure and volume of a gas are inversely proportional at constant temperature?

a) Boyles law
b) Charles law
c) Daltons law
d) Gay-Lussacs law
e) none of the above

Question 14

What is the term for gas molecules that collide without losing energy?

a) elastic collision
b) isokinetic collision
c) isothermmal collision
d) molecular collision
e) none of the above

Question 15

What is the term that refers to the frequency and energy of gas molecules colliding with the walls of its container?

a) atmospheric pressure
b) gas pressure
c) partial pressure
d) vapor pressure
e) none of the above

Question 16

Which of the following laws states that the pressure and Kelvin temperature of a gas are directly proportional at constant volume?

a) Boyles law
b) Charles law
c) Daltons law
d) Gay-Lussacs law
e) combined gas law

Question 17

What is the term for a gas that perfectly obeys the kinetic theory?

a) hypothetical gas
b) ideal gas
c) perfect gas
d) real gas
e) none of the above

Question 18

Which of the following remains constant in a closed gaseous systems?

a) pressure
b) volume
c) temperature
d) number of molecules
e) all of the above

Question 19

If the partial pressure of oxygen in capillary blood is 105 mm Hg, what is the pressure in torr?

a) 0.138 torr
b) 7.14 torr
c) 10.5 torr
d) 105 torr
e) 1050 torr

Question 20

In 1811 Amedeo Avogadros explained the law of combining volumes by stating that equal volumes of gas, at the same temperature and pressure, contain which of the following?

a) Avogadros number of molecules
b) Avogadros number of molecules times two
c) 22,400 molecules
d) 44,800 molecules
e) the same number of molecules



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