solve it in paper and scan it to me :) A rigid tank of 2m3 contains 2 kg oxygen

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solve it in paper and scan it to me :)

A rigid tank of 2m3 contains 2 kg oxygen at 200 degree C. After a process, the temperature decreases to 100 degree C. Please determine 1) the total enthalpy change; 2) heat transfer during this process and identify if it is heat gain or heat loss. A piston-cylinder device contains 2 kg of nitrogen at 200 kPa and 120 degree C. The air is now compressed according to the relationship PV15 = constant until the volume reaches 1m3. Determine the boundary work and identify if it is W in or W out.

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I can solve it completely but since time is not left......

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