A system of physical chemistry - Index of

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A system of physical chemistry - Index of

1 66 A SYSTEM OF PHYSICAL CHEMISTRY

lie between x^ and .V2 is given by: 4/ Jtt area of P1M1M2P2, where

OMj = Xi and OM2 = x^. By methods of analysis or quadrature of a

carefully drawn graph numerical values can be obtained. The following

table from Meyer's Kinetic Theory of Gases (translated by Baynes)

illustrates the point :—

Of 1000 molecules of oxygen at 0° C, whose r-m-s-speed is known

(by methods to be explained presently) to be 461*2 metres per second—

13 to

81 „

166 ,,

214 ..

202 ,,

151 >.

91 »

76 „

14 molecules have speeds below

82

from

167

215

203

152

92

77

„ 400

500

„ 600

above 700

100 metres per second.

100 to 200

200 ,, 300

300 ,, 400

500

600

700

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