The temperature of the source and the sink of a heat engine are `127^(@)C and 27^(@)C` respectively, An inventor claims its efficiency to be 30%, then

Options

A. it is impossible
B. it is possible with high probability
C. it is possible with low probability
D. data is insufficient

Answer

A

Explanation

`T_(2)=273+27=300KandT_(1)=127+273=400K`
`eta=1-T_(2)/T_(1)=1-300/400=1/4=25%`
As the maximum efficiency for the heat engine is 25%, it is impossible to get the efficiency of 30%.