Gas Laws: Question Preview (ID: 1967)

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Methane (CH4) gas diffuses through air because the molecules are
a) moving randomly
b) dissolving quickly.
c) traveling slowly
d) expanding steadily

When a cold tire is inflated to a certain pressure and then is warmed up due to friction with the road, the pressure increases. This happens because the
a) air molecules hit the walls of the tire less frequently.
b) rubber in the tire reacts with oxygen in the atmosphere.
c) air molecules speed up and collide with the tire walls more often.
d) air molecules diffuse rapidly through the walls of the tire.

The volume of 400 mL of chlorine gas at 400 mm Hg is decreased to 200 mL at constant temperature. What is the new gas pressure?
a) 400 mm Hg
b) 300 mm Hg
c) 800 mm Hg
d) 650 mm Hg

Under what circumstance might a gas decrease in volume when heated?
a) The gas is held constant at STP
b) The gas remains under uniform temperature
c) The gas is placed under increasing pressure
d) The gas undergoes a decrease in pressure

20 L of CO2 gas is at STP. What will be the new volume when the temperature is doubled?
a) 10 L
b) 20 L
c) 40 L
d) 80 L

Standard temperature and pressure (STP) are defined as
a) 0 C and 1.0 atm pressure.
b) 0 C and 273 mm Hg pressure
c) 0 K and 1.0 atm pressure.
d) 0 K and 760 mm Hg pressure

What is the equivalent of 423 kelvin in degrees Celsius?
a) -223 deg. C
b) -23 deg. C
c) 150 deg C
d) 696 deg C

The temperature at which all molecular motion stops is
a) - 460 deg. C
b) 0 deg. C
c) -273 K
d) 0 K

PV = nRT ; R = 0.0821 L atm / mol K ; When will a 0.50 mole sample of helium occupy a volume of 11.2 liters?
a) 298 K and 0.90 atm
b) 273 K and 1.10 atm
c) 373 K and 0.50 atm
d) 273 K and 1.00 atm

According to Boyle's Law, as pressure increases
a) volume stays the same
b) volume increases
c) volume decreases
d) volumbe doubles

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