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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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What is the effect of the following on the volume of 1 mol of an ideal gas?
(a) The pressure is tripled (at constantT).
(b) The absolute temperature is increased by a factor of 3.0 (at constantP).
(c) Three more moles of the gas are added (at constant P and T).
A sample of Freon-12 () occupies 25.5 L at 298 K and 153.3 kPa. Find its volume at STP.
Each of the following processes caused the gas volume to double, as shown. For each process, state how the remaining gas variable changed or that it remained fixed:
(a)Tdoubles at fixedP.
(b)Tandnare fixed.
(c) At fixed T, the reaction is
(d) At fixed P, the reaction is
Convert each of the pressures described below to atm:
(a) At the peak of Mt. Everest, atmospheric pressure is only .
(b) A cyclist fills her bike tires to .
(c) The surface of Venus has an atmospheric pressure of .
(d) At 100 ft below sea level, a scuba diver experiences a pressure of .
A 93-L sample of dry air cools from to while the pressure is maintained at 2.85 atm. What is the final volume?
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