Five moles of Nitrogen (behaving like an ideal gas) are taken around cycle acb as shown. Process ac is at constant pressure, process ba is at constant volume, and process cb is adiabatic. The temperatures at each part of the process are Ta = 300 K, Tb = 600 K, and Tc = 492 K. a) What is the change in internal energy of the gas during process ac? (b) How much work is done during ac? (c) Assume that at point a, Pa = 3 ×104 Pa and Va = 0.5 m3. What is the volume at point c? (d) What is the pressure at point b? (e) How much work is done during the whole cycle? Is it done by the gas or on the gas (by the surround- ings)?

Five moles of Nitrogen (behaving like an ideal gas) are taken around cycle acb as shown. Process ac is at constant pressure, process ba is at constant volume, and process cb is adiabatic. The temperatures at each part of the process are Ta = 300 K, Tb = 600 K, and Tc = 492 K. a) What is the change in internal energy of the gas during process ac? (b) How much work is done during ac? (c) Assume that at point a, Pa = 3 ×104 Pa and Va = 0.5 m3. What is the volume at point c? (d) What is the pressure at point b? (e) How much work is done during the whole cycle? Is it done by the gas or on the gas (by the surround- ings)?

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