2.25 Five moles of nitrogen are expanded from an initial state of 3 bar and 88C to a final state of 1 bar and 88C. You may consider Na to behave as an ideal gas. Answer the following questions for each of the following reversible processes: (a) The first process is isothermal expansion. (1) Draw the path on a Po diagram and label it path A. (ii) Calculate the following: w, q. Au, Ah. (b) The second process is heating at constant pressure followed by cooling at constant volume. (1) Draw the path on the same Po diagram, label it path B. (i) Calculate the following: w, q, Au, Ah.