The General Entropy Inequality

This ter cancels when these two equations are added together.
This ter cancels when these two equations are added together.
">" for irreversible processes
"=" for internally reversible processes
Path A is irreversible and
path B is internally reversible.
Equation.
The general

entropy inequality

:
PV diagram of a process that proceeds from state 1 to state 2 along irreversible path A and returns to state 1 along internally reversible path B.
Equation.
Application of the Clauisus Inequality to the two-step process shown in the PV diagram.
Equation.
Equation.
Adding:
Rearrange:
Equation.
Put into
differential form:
Definition of

entropy

:
Equation.
Roll your mouse over this box to close.
Join Learn Thermodynamics Advantage
  • Download Data Tables
  • Download Study Aids
  • Homework problem hints and answers
  • Get Help from Dr. B in the LT Blog
  • 120 day membership

Get it ALL for $5 US

Ch 7, Lesson C, Page 2 - The General Entropy Inequality