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Helium gas (One mole at ideal gas conditions) undergoes reversible expansion from an initial pressure of 10bar and 700K to a final pressure of 2bar.

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Helium gas (One mole at ideal gas conditions) undergoes reversible expansion from an initial pressure of 10bar and 700K to a final pressure of 2bar. (a) Calculate Q, W, and U if the Helium gas follows constant volume path. (15 marks) (b) Calculate Q, W, U and H if the Helium gas follows adiabatic path. (25 marks) Given: Specific heat capacities: Cp=3.5R;Cv=2.5R and Gas constant, R=8.314mol.Kf

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