In which situation must you do more work: inflating a balloon at sea level or inflating the same balloon to the same volume at the summit of Denali (20,310'). Explain in terms of pressure and volume change.

On a warm summer day, a large cylinder of compressed gas (propane or butane) was used to supply several large gas burners at a cookout. After a while, frost formed on the outside of the tank. Why?

A cylinder contains 0.250 mol of carbon dioxide gas (CO2) at a temperature of 27.0 degrees C. The cylinder is provided with a frictionless piston, which maintains a constant pressure of 1.00 atm on the gas. The gas is heated until its temperature increases to 127.0 degrees C. Assume that the CO2 may be treated as an ideal gas.
a. Draw the PV diagram.
b. How much work is done by the gas?
c. On what is this work done?
d. What is delta U?
e. How much heat was supplied?
f. What would W have been if P=0.50 atm?