(Answered) A 20 cubic feet insulated vessel of oxygen at a temperature

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A 20 cubic feet insulated vessel of oxygen at a temperature of 180 psia is stirred by internal paddles until then pressure becomes 300 psia. Determine (a) the change of internal energy, (b) the input work, (c) the heat, and (d) the change of entropy of 1 lb of oxygen.

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