A diatomic gas is enclosed at atmospheric pressure and at 300 K in a vertical cylinder covered by a 10 cm radius sliding piston.
Calculate:
a) What weights must be placed on the piston so that, heated the gas up to 400 K, it continues to occupy the same volume?
b) How many calories should it gives each mol of the gas to obtain this constant volume heating?
c) If the temperature increase were reached at constant pressure without putting weights, how many calories per mol would have been needed?