An isobaric process is a thermodynamic process in which the pressure of a system remains constant while its volume and temperature may change. This means that during the process, the system can either absorb or release heat without any change in pressure. In an isobaric process, the work done by or on the system can be calculated using the formula W = P \Delta V , where P is the constant pressure and \Delta V is the change in volume. Common examples include the heating of a gas in a piston where the pressure is maintained constant.