Internal energy isobaric process in terms of volume


An isobaric process is a thermodynamic process in which the pressure stays constant: ΔP = 0. The heat transferred to the system does work, but also changes the internal energy of the system. This article uses the chemistry sign convention for work, where positive work is work done on the system. Using this convention, by the first law of thermodynamics we get the equation shown here.

Related formulas


ΔUchange in internal energy (J)
Qpheat at constant pressure (J)
ppressure (pa)
ΔVchange in volume (m3)