For an isochoric process, which of the following statements is NOT...

An isochoric process is a thermodynamic process in which the volume of the system remains constant.

Since the volume is constant, the change in volume is zero, so $\Delta V = 0$.

The work done by the gas is given by $W = P \Delta V$. Since $\Delta V = 0$, the work done is $W = 0$.

According to the first law of thermodynamics, $Q = \Delta U + W$. Substituting $W = 0$, we get $Q = \Delta U$.

In an isochoric process, the temperature can change (for example, when heat is added to a gas in a rigid container, its temperature and pressure increase). Therefore, $\Delta T = 0$ is not generally true for an isochoric process (it is true for an isothermal process).

Answer: $\Delta T = 0$