The temperature- entropy diagram of a reversi-ble engine cycle is given in figure What is its efficiency?

The temperature- entropy diagram of a reversi-ble engine cycle is give

1.	The temperature- entropy diagram of a reversi-ble engine cycle is given in figure What is its efficiency?
Answer» <P> Solution :Entropychange`= int_(A)^(p)(DQ )/(T ) (S-S_0) =Q` `Q_1=T_0S_0 +1/2 T_0 S_03/2 T_0 S_0` `Q_2 =T_0(2S_0 -S_0) T_0 S_0` `Q_3 =0 , eta=(W)/( Q_1) = (Q_1 -Q_2)/(Q_1) = 1 -(Q_2)/(Q_1) = 1-(T_0 S_0 )/( 3/2T_0 S_0) = 1/3`