Five moles of Nitrogen (behaving like an ideal gas] are taken around cycle act: as shown. Process ac is at constant pressure. process bu is at constant volume. and protis cb is adiabatic. The temperatures at each part of the process are Ta : 30\" K. T; : 500 K. and '1"c : 492 K. P (a) What is the change in internal energy-' of the gas during process ac? [b] How much work is done during ac? (e) Assume that at point a. P = 2.5 X 104 Pa and V 2 [L5 1113. Till-"hat is the volume at point c? ([1] What is the pressure at point If? [:e] How much work is done during the whole cycle? Is it done by the gas or on the gas (by the surround- ings]? a. 2 x 10+ J b. 7.9 x 103 J c. 0.82 m d. 5 x 10* Pa e. -3200 J. work is done on the gas