Question

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

• A. $q_{reV}$
• B. $q_{reV}-W_{reV}$
• C. $\frac{q_{reV}}{W_{reV}}$
• D. $q_{reV}+W_{reV}$

Answer 1

The correct option is D $q_{reV}+W_{reV}$

A state function is a property whose value does not depend on the path taken to reach that specific value.

Internal energy is an example of state function.

$\Delta E=q_{rev}+w_{rev}$

Whereas heat and work done are not state functions.