Pv Diagram Isobaric. The heat transfer into or out of the system does work but also changes the internal energy of the system. If the process moves towards the right then it is an expansion.
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Weighted piston flexible container in earth s atmosphere hot air balloon. At the top is a movable piston that has a few kilograms mass. The heat transfer into or out of the system does work but also changes the internal energy of the system.
Isobaric constant pressure bar comes from the greek word for heavy.
The quantity u pv is a state function so that it can be given a name. If the process moves towards the right then it is an expansion. An isobaric process is a thermodynamic process in which the pressure of the system remains constant p const. It could be anywhere on this pv diagram any horizontal line is gonna be an isobar an isobaric process.
