Question

In a heat engine the maximum heat that it can be converted into to mechanical work
(a) depends upon friction
(b)depends upon working temperature (c) is 100%
(d)depends upon working​

Answer 1

Answer:

The second law of thermodynamics The Kelvin–Planck statement (or the heat engine statement) of the second law of thermodynamics states that it is impossible to devise a cyclically operating device, the sole effect of which is to absorb energy in the form of heat from a single thermal reservoir and to deliver an equivalent amount of work.[1] This implies that it is impossible to build a heat engine that has 100% thermal efficiency.

In a device, the complete conversion of heat energy into mechanical work is not possible at any cost.

Option A is correct