According to the first law of thermodynamics which of the following quantities represents change in a state function ?

Options

A. `q_("rev")`
B. `q_("rev")-w_("rev")`
C. `q_("rev")//w_("rev")`
D. `q_("rev")+w_("rev")`

Answer

D

Explanation

Mathematical expression of first law of themrodynamics
`DeltaE=q+w,DeltaE` is a state function.