Gas Laws Quiz

A 25 L bag has an initial temperature of 292 K, after sitting in a car for 5 hours it reaches a final temperature of 337 K,what will be the new volume of the bag?

• 22 L

• 25 L

• 29 L

• 3936 L

A gas has a temperature of 287 K, and a pressure of 2.3 atm. The gas is heated, and the pressure rises to 2.8 atm. What temperature was the gas heated to?

• 236 K

• 287 K

• 349 K

• 1848 K

The gas left in a used aerosol can is at a pressure of 1.00 atm at 300 K. If the can is thrown into a fire, what is the internal pressure of the gas when its temperature reaches 1200 K?

• 0.25 atm

• 4.00 atm

• 8.00 atm

• 34.3 atm

A sample of gas starts out at a volume of 2.5 L and 1.85 atm. The gas is placed into a new container and the pressure is measured at 1.25 atm. What is the volume of the new container?

• 0.93 L

• 1.7 L

• 3.7 L

• 5.6 L

The pressure of a sample of helium is 2.0 atm in a 0.2 L container. If the container is compressed to 0.1 L without changing the temperature, what is the new pressure?

• 20 atm

• 1 atm

• 10 atm

• 4 atm

Nine particles have speeds of 5.00, 8.00, 12.0, 12.0, 12.0, 14.0, 14.0, 17.0, and 20.0 m/s.

What is the rms speed?

• 9.35 m/s

• 13.3 m/s

• 12.3 m/s

• 14.7 m/s

Estimate the average thermal energy of a helium atom the temperature of 10 million

Kelvin (the typical core temperature in the case of a star).

• 2-10-16 J

• 2.3-10-16 J

• 1.9-10-16 J

• 2.1-10-16 J

Often, people need to add air to their tires in the winter because their tire pressure is too low. Why does this happen in winter?

• The cold temperature decreases the volume of the

• The cold temperature increases the volume of the air in the tires

• the difference in temperature between the air inside and outside the tires produces convection currents

• the density inside the tire is less than that of the surrounding air

The pressure inside a container increases when

• the number of gas molecules is increased

• the temperature is increased

• the volume is decreased

• all of these are reasons why

The diagram shows a burner heating a piston cylinder which contains a gas. Why does the volume under the piston increase with heating?

• the size of the individual gas atoms increases.

• The bottom of the piston moves toward the burner.

• the gas atoms collide at a faster rate with the piston, causing it to move up.