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Chapter 5: Q5.25P (page 228)
A 93-L sample of dry air cools from to while the pressure is maintained at 2.85 atm. What is the final volume?
Answer
The final volume of the sample is 56 L.
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A sample of Freon-12 () occupies 25.5 L at 298 K and 153.3 kPa. Find its volume at STP.
Boyle鈥檚 law relates gas volume to pressure, and Avogadro鈥檚 law relates gas volume to number of moles. State a relationship between gas pressure and number of moles.
Are the particles in a gas farther apart or closer together than the particles in a liquid? Use your answer to explain each of the following general observations:
(a) Gases are more compressible than liquids.
(b) Gases have lower viscosities than liquids.
(c) After thorough stirring, all gas mixtures are solutions.
(d) The density of a substance in the gas state is lower than in the liquid state.
In the following relationships, which quantities are variables and which are fixed: (a) Charles鈥檚 law; (b) Avogadro鈥檚 law; (c) Amontons鈥檚 law?
Why is moist air less dense than dry air?
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