A Carnot engine operates with source at 500 K and sink at 375 K. Engine consumes 600 kcal of heat per cycle. The heat rejected to sink per cycle is

Options

A. 250 kcal
B. 350 kcal
C. 450 kcal
D. 550 kcal

Answer

C

Explanation

The efficiency of the engine is
`eta = 1 - (T_(2))/(T_(1)) = 1 - (375)/(500) = (125)/(500) = 25%`
Heat consumed per cycle `Q_(1) = 600` kcal
`:.` Heat rejected to the sink
`= Q_(1) - eta Q_(1) = 600 - 0.25 xx 600 = 450` kcal