Chapter 18: Q. 9 (page 511)
1.0 mol of gold is shaped into a sphere. What is the sphere’s
diameter?
The solution deals with the transformation of gold into a sphere.
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The air temperature and pressure in a laboratory are 20C and 1.0 atm. A 1.0 L container is open to the air. The container is then sealed and placed in a bath of boiling water. After reaching thermal equilibrium, the container is opened. How many moles of air escape?
The semiconductor industry manufactures integrated circuits in large vacuum chambers where the pressure is 1.0 * 10-10 mm of Hg.
a. What fraction is this of atmospheric pressure?
b. At T = 20C, how many molecules are in a cylindrical chamber 40 cm in diameter and 30 cm tall?
A 15C, 2.0-cm-diameter aluminum bar just barely slips between two rigid steel walls 10.0 cm apart. If the bar is warmed to 25C, how much force does it exert on each wall?
of gas undergoes the process shown in FIGURE EX18.37.
a. What type of process is this?
b. What is the final temperature in ?
c. What is the final volume ?
A gas is in a sealed container. By what factor does the gas pressure change if:
a. The volume is doubled and the temperature is tripled?
b. The volume is halved and the temperature is tripled?
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