04.04 The Entropy Balance


Simplifying the complete entropy balance (uakron, 11min) is analogous to simplifying the complete energy balance. In general, there are fewer terms to worry about because the system's kinetic and gravitational energy are not involved. This presentation focuses on the same three most common systems as for energy applications.

Comprehension Questions. Write the simplified entropy balance for the following:

1. An isothermal reversible compressor.

2. The expansion stroke of an 80% efficient piston/cylinder.

3. An adiabatic, reversible, ideal gas expanding in a piston/cylinder.

4. Steam expanding through an adiabatic, reversible turbine.

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