# Isobaric Process

When a thermodynamic system undergoes a physical change in such a way that its pressure remains constant, then the change is known as isobaric process.

In this process, V and T changes but P remains constant. Hence, Charles’ law is obeyed in this process.

Equation of state From ideal gas equation, PV = μRT.

If pressure remains constant, V T.

or

Indicator diagram In Fig. 12, graph I represents isobaric expansion, and graph II represent isobaric compression.

Slope of indicator diagram,

Fig. 12

Work done in isobaric process
[as P = constant]