Question

Draw a neat labelled P - V diagram for a typical heat engine. 

Answer 1

TC ≡ Temperature of the cold reservoir,

TH ≡ Temperature of the hot reservoir

P – V diagram for a typical heat engine

In this case, T_H is the temperature at which the gas performs its work, and T_C is the temperature at which the gas performs its job. The work output is the region of the ABCDA loop.