Assuming that the working substance of a carnot's engine is a perfect gas show that the ratio of heat rejected at the sink to that extracted from the source equals the ratio of absolute temperature of the sink and the source .

Find the efficiency of a carnot's engine that works between the temperature 427 degree C and 27 degree C of the source and the sink respectively . If the 140 calories of heat are absorbed from the source by the engine in one cycle calculate the heat rejected into the sink .

A carnot's engine has an efficiency of 50% when its sinks temperature is 27 degree C what must be the change in its source temperature for increasing its efficiency of 60% ?

In a Carnot engine temperature of the source and sink is 500 K and 375 K. The engine can absorb 600 kcal heat in one cycle. Calculate the efficiency and work done in a cycle.

The temperature of source and sink of a carnot engine are 400K and 300k respectively its efficiecy is