A stationary mass of gas is compressed without friction from an initial state of 0.4 m3 and 1.5 bar to 0.2m3 and 1.5 bar, the pressure remaining constant during the process. There is a heat transfer of 40 kJ of heat from the gas during the process. How much does the internal energy of the gas change? Plot the process roughly on Pressure vs Vol as well as Temperature vs Volume scale.
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