Five moles of nitrogen are expanded from an initial state of 3 bar and 88C to a

Five moles of nitrogen are expanded from an initial state of 3 bar and 88ºC to a fi nal state of 1 bar and 88ºC. You may consider N2 to behave as an ideal gas. Answer the following questions for each of the following reversible processes:

(a) The fi rst process is isothermal expansion.

(i) Draw the path on a Pv diagram and label it path A. (ii) Calculate the following: w, q, Du, Dh.

(b) The second process is heating at constant pressure followed by cooling at constant volume.

(i) Draw the path on the same Pv diagram, label it path B. (ii) Calculate the following: w, q, Δu, Δh.