AnswersLA-Chemistry AThe Ideal Gas Law

The Ideal Gas Law — Unit test Answers

15 verified answers3 views
21
Free Preview

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

A
It will double.
B
It will decrease.
C
It will increase slightly.
D
It will remain the same.
22
Free Preview

Which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular theory?

A
more gas particles more collisions higher pressure
Option A
B
smaller volume crowded particles less collisions lower pressure
Option B
C
smaller volume crowded particles more collisions higher pressure
Option C
D
more gas particles more kinetic energy more volume higher pressure
Option D
23

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?Use .

Question illustration
A
0.75 atm
B
0.89 atm
C
1.1 atm
D
1.3 atm
24

The diagrams show gases that are stored in two separate but similar containers.If both gases are at the same temperature, which one has the greater pressure?

Question illustration
A
gas 1 because the particles are moving much faster
B
gas 1 because it has fewer particles that are close together
C
gas 2 because it has more particles that are colliding
D
gas 2 because the particles have more space between them
25

Which sequence describes the result of increasing the temperature of a gas in a container?

A
higher kinetic energy ® greater collision force ® higher pressure
B
lower kinetic energy ® greater collision force ® higher pressure
C
higher kinetic energy ® lower collision force ® lower pressure
D
lower kinetic energy ® lower collision force ® lower pressure
26

Which quantity is held constant when working with Boyle’s, Charles’s, and Gay-Lussac’s laws?

A
volume
B
moles
C
pressure
D
temperature
27

Which is a postulate of the kinetic-molecular theory?

A
Gas particles have a small volume relative to the spaces between them.
B
Gas particles have a large volume relative to the spaces between them.
C
Gas particles are very small in size and always move slowly.
D
Gas particles are very large in size and always move slowly.
28

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia?Use .

Question illustration
A
0.27 atm
B
0.36 atm
C
0.54 atm
D
0.90 atm
29

Which units of pressure are equivalent and require no conversion of the value?

A
mmHg and atm
B
kPa and Pa
C
mmHg and torr
D
atm and kPa
30

Why does changing the volume of a container change the pressure of the gas in it?

A
Changing the volume reduces the number of molecules so they hit the walls of the container less often.
B
Changing the volume reduces the force with which the molecules hit the walls of the container.
C
Changing the volume increases the speed of the molecules so they hit the walls of the container more often.
D
Changing the volume increases the area that the molecules collide with so the force is spread over a larger area.

Did you find these answers helpful?

More from this Course

Quiz
29 verified answers

Unit Test

Quiz
4 verified answers

Unit Test

Instruction
19 verified answers

Instruction