7) (20%) An ideal gas initially in a piston-cylinder at 150 kPa, 50C, and 0.03 m...

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7) (20%) An ideal gas initially in a piston-cylinder at 150 kPa, 50C, and 0.03 m is first heated at constant pressure until the volume doubles. It is then allowed to expand isothermally until the volume doubles again. a) Sketch the processes on a p-V and T-s diagrams. b) Determine the pressure and temperature of the gas at the final state. 7) (20%) An ideal gas initially in a piston-cylinder at 150 kPa, 50C, and 0.03 m is first heated at constant pressure until the volume doubles. It is then allowed to expand isothermally until the volume doubles again. a) Sketch the processes on a p-V and T-s diagrams. b) Determine the pressure and temperature of the gas at the final state.