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# Isochoric process

p-V graph showing an different thermodynamic processes (1: isothermal, 2: isochoric, 3: isobaric, 4: adiabatic).

In an isochoric process the volume is kept constant (i.e. $\Delta V=0$). This implies that the work done by the gas is zero (i.e. $W=0$).

The change in internal energy during an isochoric process is equal to the heat supplied to the system (i.e. $\Delta U=Q$).

The p-V graph of an isochoric process is a vertical line.

$p=$pressure; $Q=$heat supplied; $T=$temperature; $\Delta U=$change in internal energy; $V=$volume; $W=$work done