Ch 2 - Properties of Pure Substances

In this lesson, I present a brief discussion of

pure substances

and the

phases

in which they can exist.

In this lesson, you will learn how

pressure

,

temperature

and

molar volume

are related to each other. I introduce

phase diagrams

to help visual learners better understand the relationship.

Many important

properties

in thermodynamics are presented in

tables

. In this lesson, you will learn how to obtain data from these

tables

.

In this lesson, you will learn about

vapor-liquid phase equilibrium

(VLE) of pure substances. Then, you will learn about the phase equilibrium associated with the

evaporation

of water in the presence of air. In addition, you will learn the various definitions and nomenclature used to describe

humidity

,

evaporation

and

boiling

.

In this lesson, we will study the simplest

equation of state

(EOS): the

ideal gas EOS

. We will also discuss the limitations of the

ideal gas EOS

and how to determine if the error associated with using it is acceptable. Then, we will study another EOS that takes into account deviations from ideal gas behavior. This is a graphical EOS that uses the

Principle of Corresponding States

and the

Generalized Comressibility Charts

to evaluate the deviation ideality exhibited by

real gases

.

In this lesson, we will study more sophisticated EOS's that are more accurate than the ideal gas EOS and more computer friendly than the Compressibility Factor (graphical) EOS.