At a place where the surroundings are at 1 bar 27 C, a closed rigid thermally insulated tank contains 2 kg air at 2 bar, 27 C. This air is then churned for a while by a paddle wheel connected to an external motor. If it is given that the irreversibility of the process is 100 kJ, find the final temperature and the increase in the availability of air. Assume for air, Cv = 0.718 kJ/kg.K.
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