1.

A thermodynamic process ofone mole ideal monatomic gas 2.is shown in figure. The 4 efficiency of cyclic process ABCA will be

Answer»

`25%`
`12.5 %`
`50%`
`7.7%`

Solution :`W = 1/2 P_(0) V_(0) , T_(A) = T_(0) , T_(B) = 2T_(0) , T_(C) = 4T_(0)`
Heat supplied` = Q_(AB) + Q_(BC) = C_(V) T_(0) + C_(p)2T_(0)`
` = 13/2 RT_(0) = 13/2 P_(0) V_(0) [:. P_(0)V_(0) = RT_(0)]`
` :. ` EFFICIENCY ` = (1/2 P_(0)V_(0))/(13/2 P_(0) V_(0)) xx 100 "" (. :. P_(0) V_(0) = RT_(0))`
` = 1/13 xx 100 = 7.7 %`


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