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What is the heat flow during the process?

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Four moles of O2 are taken from A to B in the process shown in the PV-diagram below. Assume the gas may be treated as ideal.

a) What is the heat flow during this process (include the sign)?

b) Does heat enter or leave the gas?

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This solution calculates the heat flow from the work done in plain text and in an attached Word document.

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Notations:
Starting volume V_a = 0.8 m^3
Ending volume V_b = 0.2 ...

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