mperature, Thermal Expansion, and Gas Laws
pressure is 1.00 atm. What is the number of molecules of air in
the lecture hall?
Problems 59 and 60 are paired.
59. N A solid aluminum sphere has a radius of 0.5700 m when it is
at a temperature of 90.0°F. What is the change in volume of the
sphere when it is heated to a temperature of 110.0°F?
60. C A solid aluminum sphere is heated from an initial tempera-
ture to a higher temperature. If, instead, the aluminum sphere
were hollow but started with the same radius at the same initial
temperature and was then heated to the same final temperature,
how would the new volume of the hollow sphere compare with
that of the solid aluminum sphere? Explain your reasoning.
61. N A rigid tank contains 3.00 X 10-2 m² of an ideal gas at a pres-
sure of 5.15 X 10% Pa and a temperature of 300.0 K. How many
a. moles and b. molecules of the gas are contained in the tank?
62. N In December 2006, two Missouri representatives filed legisla-
tion requiring that the price of motor fuel be adjusted for volume
changes caused by temperature fluctuations. The industry stan-
dard assumes the temperature is 60°F. In the summer, when the
temperature easily exceeds 60°F in Missouri, gasoline expands
and its density decreases Recause
at one end as shown in Figure
y separates the gas from the out-
H in a vertical plane. In Figure
the tube has length Li, whereas
n of air has length L2. Find an
ameters given) for the length L3
re P19.49C, when the tube is
ect to the vertical.
Ivin defined absolute zero, why
to be the temperature of some
ne temperature of liquid helium?
de negative temperature?
uses a constant-volume ther-
1 by volume. you