The INCORRECT statement in relation to first law of thermodynamics i.e., `Delta U=q+W` is, _____________.

Options

A. q is positive if heat is absorbed by the system and q is negative if heat is released by the system.
B. `Delta U` is positive if internal energy of the system increases and `Delta U` is negative if internal energy of the system decreases.
C. W is positive if work is done on the system and W is negative if work is done by the system.
D. q+W is not a state function.

Answer

D