# Isobaric Process - Entropy

Isobaric process is a thermodynamic process where the pressure is kept constant, \(\Delta p = 0\).

### Isobaric process - entropy Formula

\(\large{ S = \Delta S \; C_p \; \left[ ln \left( \frac{T_f}{T_i} \right) \right] }\)

\(\large{ S = \Delta S \; \left( n\; C_v \right) \; \left[ ln \left( \frac{T_f}{T_i} \right) \right] }\)

Where:

\(\large{ S }\) = entropy

\(\large{ \Delta S }\) = change in entropy

\(\large{ C_p }\) = heat capacity at constant pressure

\(\large{ C_v }\) = heat capacity at constant volume

\(\large{ ln }\) = natural logarithm

\(\large{ n }\) = number of moles

\(\large{ T_f }\) = final temperature

\(\large{ T_i }\) = initial temperature

Tags: Equations for Temperature Equations for Pressure Equations for Entropy