Questions
N moles of a monoatomic gas is carried round the reversible rectangular cycle ABCDA as shown in the fig. The temperature at A is T0. The thermodynamic efficiency of the cycle is
a
15%
b
50%
c
20%
d
25%
detailed solution
Correct option is A
QAB=NCVT0QBC=NCp2T0QCD=−NCV2T0QDA=−NCpT0Heat input, Q1=QAB+QBC=NT0CV+2CpHeat lost, Q2=NT02CV+Cp∴ η=1−Q2Q1=1−2Cv+CpCv+2Cp=1−(2+γ)(1+2γ)=1−(2+5/3)(1+2×5/3)=1−(11/3)(13/3)=213=213×100≈15%Talk to our academic expert!
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