Gas Laws

Which of the following is true regarding gases?

• Gases tend to have much higher densities than liquids.
• Gases have set volumes that don't change if temperature or pressure change.
• Gases only mix with certain other gases.
• Gases will fill the volume of whatever container they are in.

Pressure is...........

• force/area
• area/force
• fish/ocean
• pain/chemistry exam

If the pressure outside today is 0.921 atm, what is it in mmHg?

• 760 mmHg
• .00121 mmHg
• 700 mmHg
• 95.2 mmHg

If the pressure inside a helium tank is 900 kPa, what is it in mmHg?

• 9000 mmHg
• 6600 mmHg
• 900 mmHg
• 120 mmHg

If the pressure inside a helium tank is 900 kPa, what is it in atm?

• 5.43 atm
• 10.45 atm
• 16.12 atm
• 8.71 atm

Gas laws require all temperatures to be in Celsius.

• True
• False

If a sample of gas is kept at constant temperature, what will happen to the volume if you double the pressure?

• Volume will double

• Volume will halve

• Volume will quadruple

• Volume will stay the same

If a sample of gas is kept at constant volume, what will happen to the pressure if you double the temperature?

• Pressure will double

• Pressure will halve

• Pressure will quadruple

• Pressure will stay the same

If a fixed volume jar is kept at constant T, what will the pressure difference be if you remove half the air molecules?

• Pressure will double

• Pressure will halve

• Pressure will quadruple

• Pressure will stay the same

If a sample of gas in a balloon is 0.25 L inside a freezer (-20 C), what volume will it be in a hot car (40 C)?

• 0.31 L

• 0.50 L

• 0.25 L

• 0.13 L