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Question: a pistoncylinder device contains 40 l of air at 150...

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A piston-cylinder device contains 40 L of air at 150 kPa and 25°C. A 100 W electric resistance heater inside the cylinder is turned on for 10 minutes. The pressure of air remains constant during this process. The final temperature of the air at the final state is 167 °C. a) What is the heat loss during this process? b) Assuming variable specific heat capacity for the air, what is the maximum amount of work that could be obtained from the air during this process? c) What is the second law efficiency for this process?

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