Question

A heat engine absorbs heat Q₁ at temperature T₁ and heat Q₂ at temperature T₂ . Work done by the engine is (Q₁ + Q₂). This data

(A)  Violates 1^st law of thermodynamics

(B)  Violates 1st law of thermodynamics if Q₁ is –ve

(C)  Violates 1^st law of thermodynamics if Q₂ is –ve

(D)  Does not violate 1^st law of thermodynamics 

Answer 1

(D) Does not violate 1^st law of thermodynamics