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Q.

One mole of an ideal diatomic gas Cv=5 cal K1mol1)changes its state from state 1 (27° C 1 L) to state 2 (127° C, 10 L). For this process. which of the following is(are) correct?

(Given :R=2 cal K1mol1)

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a

ΔU=500 cal

b

ΔS=5in 43+2 in 10 cal K1

c

ΔH=700 cal

d

G of the process can't be calculated using given information.

answer is A, B, C, D.

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Detailed Solution

ΔH=nCPΔT=1×(5+2)×100=700calΔU=nCVΔT=1×5×100=500calΔS=nRln V2V1+nCV ln T2T1=2 ln 10+5 ln 43

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One mole of an ideal diatomic gas Cv=5 cal K−1mol−1)changes its state from state 1 (27° C 1 L) to state 2 (127° C, 10 L). For this process. which of the following is(are) correct?(Given :R=2 cal K−1mol−1)