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5 mole of an ideal gas for which Cv,m=3/2R, initially at 20 oC and 1 atm...

5 mole of an ideal gas for which Cv,m=3/2R, initially at 20 oC and 1 atm undergoes a two-stage transformation.

For each of the stages described in the following list, Calculate the final pressure as well as q, w, ∆U, ∆H and ∆S.

a) The gas is expanded isothermally and reversibly until the volume triple.

b) then, the temperature is raised to T=2000 oC at the constant volume. Note: R= 8.314 j/mol.K or 0.082 lt.atm/mol.K, 1lt.atm= 101.325 joule

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