2. A mass of 0.08 kg of helium expands polytropically in a cylinder, according to the law pV^n = constant, from a pressure of 8.20 bar and a temperature of 900°C to a pressure of 1.3 bar. The final temperature is 362°C. а.Determine EACH of the following: I.The index of expansion; II.The work transfer; III.The heat transfer; IV.The change in entropy. b.Sketch the processes on p-V and T-s diagrams

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