Chapter 5: Q5.34P (page 228)
Why is moist air less dense than dry air?
The density of moist air is less than dry air because moist air has a lower molecular mass.
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A 93-L sample of dry air cools from to while the pressure is maintained at 2.85 atm. What is the final volume?
What is the effect of the following on the volume of 1 mol of an ideal gas?
(a) Temperature decreases from 800 K to 400 K (at constantP).
(b) Temperature increases from to (at constantP).
(c) Pressure increases from 2 atm to 6 atm (at constant T).
In preparation for a demonstration, your professor brings a 1.5-L bottle of sulfur dioxide into the lecture hall before class to allow the gas to reach room temperature. If the pressure gauge reads 85 psi and the temperature in the hall is , how many moles of sulfur dioxide are in the bottle?
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.
To collect a beaker of gas by displacing the air already in the beaker, would you hold the beaker upright or inverted? Why? How would you hold the beaker to collect ?
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