in isochoric process what is constant

In an isochoric process, the volume of the system remains constant.

Quick Scoop: Isochoric Process

• “Isochoric” literally means constant volume.

• Because the volume does not change, the change in volume ΔV\Delta VΔV is zero.

• As a result, the pressure and temperature can change, but the system does no pressure–volume work W=PΔV=0W=P\Delta V=0W=PΔV=0.

A simple way to picture it is a gas in a rigid, sealed container: you can heat it so pressure and temperature rise, but the container cannot expand, so the volume stays fixed — that’s an isochoric process.

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