A thermodynamic process is a chemical or physical process that takes place in a thermodynamic system, which changes the system from an initial state to a final state. There are different forms of thermodynamic processes. Isobaric and isovolumetric processes are two of these processes.
The key difference between the isobaric and isovolumetric processes is that the isobaric process occurs at constant pressure while the isovolumetric process occurs at constant volume.