Question

derivation of carnot engine

Answer 1

Here the high temperature TH and the low temperature TL are temperatures as measured on an ideal gas thermometer, that is T = pV NR . Onecycle of the Carnot engine acts as follows: Leg 1: Isothermal expansion at high temperature. As the gas expands, it lifts a big pile of sand — that is, it does work.

Answer 2

After this q2/q1 = t2/t1
So efficiency = 1-q2/q1 or 1- t2/t1