Interactive Practice on Gas Laws

Choose the correct answer.

1. The relationship between pressure and temperature (given other factors constant) is
   • direct
   • inverse
   • neither
2. Avogadro's law is the direct relationship between
   • temperature and pressure
   • number of moles and volume
   • pressure and volume
3. Given a helium atom and an argon atom, which would diffuse faster?
   • helium
   • argon
   • both would diffuse at the same rate
4. True or false: all the atoms in a sample of gas are moving at the same speed.
   • True
   • False
5. Given two flasks of equal volume at the same temperature and pressure, if one is filled with argon and one with neon, which will contain more moles of gas?
   • argon
   • neon
   • neither, both will have the same number of moles of gas
6. One mole of any gas has a volume of
   • 1.0 L
   • 5.0 L
   • 10.0 L
   • None of these
7. One of the assumptions of the ideal gas law is that
   • Gas particles move very slowly
   • Molecules have no attraction to one another
   • Molecules move in curved paths
   • None of these are assumptions
8. The average kinetic energy of particles in a gas sample is proportional to
   • temperature in Kelvin
   • temperature in Celcius
   • the pressure in atmospheres
   • the pressure in kilopascals
9. The unit mm Hg is a unit of
   • Temperature
   • Pressure
   • Volume
   • mass
10. If we double the number of moles of gas in a sealed container, the pressure
    • is halved
    • stays the same
    • is doubled
11. If we reduce the volume of a sample of gas, the pressure
    • increases
    • decreases
12. Will water boil above 373 K or below 373 K on the top of a mountain?
    • above 373 K
    • below 373 K
    • the boiling point will not be changed
13. Suppose you have two samples of gas at the same temperature. Which will have particles with the higher average velocity?
    • neon
    • helium
    • both will have the same average velocity
14. How does vapor pressure react to increased temperature?
    • The vapor pressure is increased.
    • The vapor pressure is decreased.
    • The vapor pressure does not change unless the atmospheric pressure changes.
15. Diethyl ether has a boiling point of 35 Celcius, while water has a boiling point of 100 Celcius. Which is more volatile?
    • Diethyl ether
    • water
    • neither is volatile
16. Sublimation is the process of
    • going from a gas to a liquid
    • going from a gas to a solid
    • going from a solid to a liquid
    • going from a solid to a gas
17. Volatile substances would tend to have
    • a higher surface tension than nonvolatile substances
    • a lower surface tension than nonvolatile substances
18. Boyle discovered the relationship between
    • pressure and temperature
    • volume and temperature
    • pressure and volume
19. Which of the following refers only to the motion of a gas into an evacuated container?
    • diffusion
    • effusion
20. An oxygen ATOM will diffuse at what speed relative to a helium atom?
    • four times as fast as helium
    • twice as fast as helium
    • half as fast as helium
    • one fourth as fast as helium

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