Question 1

Which equation represents the Ideal Gas Law?

Accepted Answer

$$P V = n R T$$

Question 2

A sample of nitrogen dioxide gas at 130 $$^\circC $$and 315 torr occupies a volume of 500 mL. What will the gas pressure be if the volume is reduced to 325 mL at 130 $$^\circC$$?

Accepted Answer

$$0.45$$ atm

Question 3

If the temperature of a gas is doubled while the pressure and amount of gas remain constant, what happens to the volume?

Accepted Answer

The volume doubles.

Question 4

A cylinder with a movable piston contains 0.611 moles of gas and has a volume of 295 mL. What will its volume be if 0.103 moles of gas escape?

Accepted Answer

$$0.246 L$$

Question 5

Which of the following is a necessary condition for using the combined gas law?

Accepted Answer

The amount of gas (n) must remain constant.

Question 6

On most spray cans it is advised to never expose them to fire. If a spray can is used until all that remains is the propellant gas, which has a pressure of 1350 torr at 25 $$^\circC. If $$the can is then thrown into a fire at 455 $$^\circC$$, what will the new pressure (in torr) in the can be?

Accepted Answer

$$2,190$$ torr

Question 7

Which variable must be converted to Kelvin before using the Ideal Gas Law?

Accepted Answer

Temperature

Question 8

A sample of sulfur hexachloride gas occupies 5.30 L at 202 $$^\circC. $$Assuming that the pressure remains constant, what temperature (in $$^\circC) is $$needed to decrease the volume to 5.25 L?

Accepted Answer

$$194$$ $$^\circC$$

Question 9

Which of the following is NOT a step in solving an Ideal Gas Law derivation problem?

Accepted Answer

Convert all pressures to atmospheres regardless of the units used in the problem.

Question 10

A gas occupies a volume of 2.0 L at a pressure of 1.0 atm and a temperature of 300 K. If the pressure is increased to 2.0 atm and the temperature is increased to 600 K, what is the new volume?

Accepted Answer

$$4.0 L$$

Ideal Gas Law Derivations and Applications

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