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Introduction to the Clausius Inequality Lesson

In Chapter 6, we:

In Chapter 7, we:

Apply the
2nd Law
to the individual processes that might make up a thermodynamic cycle.
Introduce a new thermodynamic property called
entropy
.
Show how this new property can help us analyze both individual processes and cycles.
Investigate how
entropy
is related to other thermodynamic properties.
Apply what we learn to some very special types of processes:
polytropic
processes and
isentropic
processes.

We begin our study of

by considering the

C5.

Lesson 7A: page 1 of 12

In chapter 6, we spent a great deal of time and effort learning how the 2nd Law can be applied to thermodynamic cycles.
This paid off with a deeper understanding of the 2nd Law, thermodynamic temperature scales, such as the Kelvin Scale, and the Carnot Efficiency.
In this chapter, we shift gears and take a look at how the 2nd law can be applied to individual processes.
This will lead us to the definition of a new property called Entropy.
We will investigate how our new property, entropy, is related to the thermodynamic properties with which we are already familiar, such as P, V, U and H.
We will also use entropy to help us analyze both individual processes and thermodynamic cycles.
We wrap up this chapter with a look at two very special types of processes: polytropic processes and isentropic processes.
The basis for the definition of entropy is an equation called the Clausius Inequality.
Flip the page and let’s find out what this equation is and why it is useful.