Question

In thermodynamics, the work done by the system is considered ........ and the work done on the system is considered ........................
(A) positive, zero
(B) positive, negative (C) negative, positive
(D) zero, infinite

Answer 1

Answer:

(B)  Positive ,Negative

Explanation:

As per the question,

According to thermodynamics rule, work done on the system refers to energy addition to the system . this means work is added, hence it is positive . whereas work done by the system refers to energy subtraction from the system. this means work is subtracted from the system, hence it is negative. In brief work is defined as the force multiply by displacement. as we know that its S.I unit is joule (J).

Hence,the correct option is (C)