A quantity of a certain perfect gas is compressed from an initial state of 0.083 m3 ,1 bar to a final state of 0.034 m3 , 3.9 bar. The specific heat at constant volume is 0.727 kJ/ kg K, and the specific heat at constant pressure is 1.02 kJ/kg K. The observed temperature rise is 145 K. Calculate the mass of gas present to two decimal places with the Sl unit.
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