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Question

Three moles of an ideal gas at 200K and 2.0 atm pressure undergo reversible adiabatic compression until the temperature becomes 250K for the gas Cv is 27.5JK1mol1 in this temperature range. Calculate q, w, δU, δH and final V and final P.

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Solution

q=0 (Adiabatic process)
n=3 moles
U=nCVT=2×27.5×50
U=4125J
Now, U=q+w
U=w
w=4125J
Now, CPCV=R
CP=R+CV=8.314+27.5=35.814 J mol1K1
H=nCPT=3×35.814×50=5372.1J

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