2 moles of He gas (r=5/3) are initially at a temperature of 27^(@)C an – InterviewSolution

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1.	2 moles of He gas (r=5/3) are initially at a temperature of 27^(@)C and occupy a volume of 20L. The gas is first expanded at constant pressure until the volume is doubled, then undergoes reversible adiabatic change until the temperature returns to its initial value. Which curve is correct for Pvs V?
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