Apiston contains 160 moles of an ideal monatomic gas that initally has a pressure of 1.9 × 105 pa and a volume of 3.6 m3. the piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir.

the pressure of the gas is increased to 4.9 × 105 pa while maintaining a constant volume.
the volume of the gas is increased to 10.6 m3 while maintaining a constant pressure.
the pressure of the gas is decreased to 1.9 × 105 pa while maintaining a constant volume.
the volume of the gas is decreased to 3.6 m3 while maintaining a constant pressure.

it may you to recall that cv = 12.47 j/k/mole and cp = 20.79 j/k/mole for a monatomic ideal gas, and that the number of gas molecules is equal to avagadros number (6.022 × 1023) times the number of moles of the gas.