The efficiency of an ideal heat engine working between the freezing point and boiling point of water is

The efficiency of an ideal heat engine working between the freezing po

1.	The efficiency of an ideal heat engine working between the freezing point and boiling point of water is
Answer» `26.8%` `20%` `6.25%` `12.5%` Solution :Efficiency of an ideal heat engine, `eta = (1- (T_(2))/(T_(1)))` FREEZINGPOINT of water `= 0^(@)C = 273 K` Boiling POINT of water `= 100^(C) = (100 + 273)K = 373 K` `T_(2)` : Sink temperature = 273 K `T_(1)` : Source temperature = 373 K `% eta = (1-(T_(2))/(T_(1))) xx 100 = (1-(273)/(373)) xx 100 = 26.8%`