Gas Laws: Boyles, Charles and Gay-Lussac

Charles’ Law states that ____________.

• The pressure of a gas is inversely proportional to its temperature

• The volume of a gas is inversely proportional to its temperature

• The pressure of a gas is directly proportional to its temperature

• The volume of a gas is directly proportional to its temperature

If the volume of a container of gas is reduced, what will happen to the pressure inside the container?

• The pressure will increase

• The pressure will not change

• The pressure will decrease

• The pressure depends on the type of gas.

If a gas is heated to 225^oC, increasing the pressure from 2230 mmHg to 4560 mmHg, what was the initial temperature?

• 61.1^oC

• 194.6^oC

• 2^oC

• 540.8^oC

A balloon with a volume of 5.3 L is taken from an indoor temperature of 24^oC to the outdoors. The volume of the balloon outside is 4.9 L. Determine the temperature outside in degrees Celsius.

• 1.6^oC

• 6^oC

• 18^oC

• 28^oC

Two hundred liters of helium at 28^oC is placed into a tank with an internal pressure of 600 kPa. Find the volume of the helium after it is reduced to -45^oC.

• 198,7 kPa

• 373.2 kPa

• 454.5 kPa

• 792.1 kPa

I have a 186 L of gas in a piston at a temperature of 250^oC. If I cool the gas until the volume decreases to 85 L, what will be the temperature of the gas?

• 118 K

• 239 K

• 456 K

• 523 K

A sample of helium gas has a volume of 200 ml at 0.960 atm. What pressure, in kilopascals, is needed to reduce the volume at constant temperature to 50 ml?

• 30 kPa

• 273 kPa

• 332 kPa

• 389 kPa

A sample of air at 0^oC and 1 atmosphere is heated at constant volume until its pressure increases to 980 mmHg. What is the new temperature of the sample in degrees Celsius?

• 23^oC

• 79^oC

• 234^oC

• 352^oC

A gas has a pressure of 4.62 atm when its volume is 2.33 L. If the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? Express the final pressure in mmHg.

• 10.5 mmHg

• 397 mmHg

• 3511 mmHg

• 7943 mmHg

Which of the following has the highest pressure?

• 3.5 atm

• 209 torr

• 304 kPa

• 1900 mmHg