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A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3,...

A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3, 1 bar to a final state of 0.034 m3, 3.9 bar. The specific heat at constant volume is 0.724 kJ/kg×K, and the specific heat at constant pressure is 1.020 kJ/kg×K. The observed temperature rise is 146K. Calculate the specific gas constant, R, the mass of gas present, and the internal energy of the gas.

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