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An ideal monatomic gas is taken from state A to B, then from state B to state C and finally back to state A as shown in the p-V diagram. Which of the following is correct for BC process?

a
ΔQ +ve, ΔU -ve, ΔW +ve
b
ΔQ +ve, ΔU+-ve, ΔW -ve
c
ΔQ +ve, ΔU +ve, ΔW +ve
d
ΔQ -ve, ΔU -ve, ΔW -ve

detailed solution

Correct option is D

T0 = TA = p0V0/nR, TB = 5T0, TC = 4T0So for BC, ΔUBC = nCV(TC-TB)ΔUBC = n 3R/2 (4T0-5T0)Also

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