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The Principles of Thermodynamics
book

The Principles of Thermodynamics

by N.D. Hari Dass
October 2013
Intermediate to advanced content levelIntermediate to advanced
352 pages
13h 56m
English
CRC Press
Content preview from The Principles of Thermodynamics
The van der Waals Equation 239
The important conclusion that follows is that all maxima occur at V
r
1 and that all
minima occur at V
r
1. This further has the very important consequence that P
max
r
is always positive. On the other hand, P
min
r
can be positive or negative depending on
whether
˜
V
r
is greater than
2
3
or lesser than it, while still being lesser than 1. These
points will assume signicance while discussing the issue of negative pressures in
vdW systems.
For pressures above P
max
r
as well as for pressures below P
min
r
, the cubic equation
determining the intersection of a vdW isotherm with P
r
= const. has only one root.
This can be checked by applying ...
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Publisher Resources

ISBN: 9781466512085