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Question: a gas at 300 kpa is trapped inside a pistoncylinder...

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A gas at 300 kPa is trapped inside a piston-cylinder device. It receives Qin= 25 kJ of heat while it expands performing a boundary work of WB= 5.0 kJ . At the same time Wel= 15 kJ of electrical work is transferred into the system. Neglect KE and PE.

A) Evaluate Q with appropriate signs.

B) Evaluate Wel with appropriate signs.

C) Evaluate WB with appropriate signs.

D) Evaluate Wext with appropriate signs.

E) What is the net change in stored energy E of the system?

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