Consider a container with a frictionless piston that contains a given amount of an ideal gas. Assume the initial volume of the gas is 7 L, the initial temperature of the gas is 22.1 °C, and the system is in equilibrium with an external pressure of 1.1 bar. In step 1, the gas is cooled reversibly to a final temperature -29.9 °C. The external pressure remains constant at all times. In step 2 the gas is heated at constant volume to a final temperature 4.1 °C.
A) What is the final pressure of the gas?
B) What is the final volume?
C) Calculate w for the overall process (steps 1 + 2)