# Introduction: Entropy Balances, Open Systems

Entropy change due to mass flow in and out of the system

So, we must add another term to the right-hand side of the

#### closed system entropy balance equation

:+

=

Entropy generation within the system

Entropy change due to heat transfer

Change in the entropy of the system

In Lesson 8A we wrote the

#### entropy balance equation

for closed systems.=

+

Closed System

Open

System

System

In this lesson, we will develop

#### entropy balance equations

for open systems.Mass flowing into and out of the system carries entropy with it, just as it carries energy with it.

Confused and have questions? We've got answers. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors.

© B-Cubed, 2003, 2005, 2006, 2014, 2018. All rights reserved.

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