Question

An inventor is designing an engine that has a cycle with maximum temperature of 572 K that exhausts heat to an open container of ice and water. What is the minimum amount of exhaust heat that will be produced for each Joule of heat supplied?

Answer 1

We know that, For any engine, the maximum efficiency will be if engine operate on Carnot cyccle. In other words for minimum exhaut of heat for each joule of heat supply at source, engine Must Carnot engine.

Maximum temperature During cycle = 572 K , means Heat source temperature = 572 K

in Open container of Ice and water, Temperature will be

so heat sink temperature = 273 K

For Carnot engine efficiency is given by

Let heat supply = 1 J

From the above equation

Per Joule of heat supply.