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Document Type

Research

Abstract

The combined laws of Boyle and of Gay-Lussac give the familiar formula pv = nRT for the equation of state of any gas. No single gas, however, obeys this law exactly under all conditions. The classical experiment of Joule, moreover, seemed to show that the internal energy of a gas is independent of the volume, or (δU/δV)τ . More exact measurements subsequently performed by Joule and Thomsen established the fact that this conclusion is also inexact for all real gases, but that it is approached more closely the more a gas approaches the 'ideal state'. Deviations from these two laws are caused by the same phenomena, namely, the complexities of the force fields surrounding the molecules and other properties of the individual molecules composing the gas. It may be said that no real gas is ideal and that every gas approaches ideality as the pressure approaches zero or the volume approaches infinity.

Publication Date

1939

Journal Title

Proceedings of the Iowa Academy of Science

Volume

46

Issue

1

First Page

183

Last Page

185

Copyright

© Copyright 1939 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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