Question

A heat engine absorbs heat `Q_(1)` at temperature `T_(1)` and `Q_(2)` at temperature `T_(2)` . Work done by the engine is `(Q_(1)+Q_(2))` . This data:
A. Violates first law of thermodynamics
B. Violates first law of thermodynamics if `Q_1 = - ve`
C. Violates first law of thermodynamics if `Q_2 = - ve`
D. Does not violate first law of thermodynamics.

Answer 1

Correct Answer - D
Some mechanical energy is always converted to other form of energy or total heat cannot be converted to useful work. This is `II` law of thermodynamics.