A) it is impossible
B) it is possible with high probability
C) it is possible with low probability
D) data are insufficient
Correct Answer: A
Solution :
Efficiency of heat engine is, \[\eta =1-\frac{{{T}_{2}}}{{{T}_{1}}}\,or\,\,\eta =\frac{{{T}_{1}}-{{T}_{2}}}{{{T}_{1}}}\] Here, \[{{T}_{1}}=273+127=400\,K\] \[{{T}_{2}}=273+27=300K\] \[\therefore \eta =\frac{400-300}{400}=\frac{100}{400}=0.25=25%\] Hence, 26% efficiency is impossible for a given heat engine.You need to login to perform this action.
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