Analyze the two statements below. (A) When heat is supplied to a...

Statement (A) is false because during an isothermal process or a phase change (such as melting or boiling), heat is supplied to the system but its temperature remains constant.

Statement (B) is true because the work done by a thermodynamic system is given by $W = \int P dV$. Since absolute pressure $P$ is always positive, positive work ($W > 0$) implies that the change in volume $dV$ must be positive, meaning the volume must increase.

Hence, B is true but A is false.