A system of physical chemistry - Index of

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A system of physical chemistry - Index of

ATOMIC HEATS OF SOLIDS 65

therefore, to convert the one into the other. The procedure is as

^

follows. On the basis of thermodynamics we have the relation—

c. = .

c.,( + '^"'-^^

( - '^^

where a is the linear coefficient of expansion, V the molecular or atomic

volume, and K the compressibility. Now experiment has shown that

V

it is allowable to consider ^ as a constant, independent of T (especially

as it occurs in a small correction term), and further, making

use of

Gruneisen's relation {Verhand. d. d. physik. GeselL, 191 1, 49 ^^'

garding the proportionality between C^ and the expansion coefficient a,

we can rewrite the above expression in the form—

where A is a constant characteristic of each substance. The values

of A are given in the following table for some metals and salts :—

Substance.

Values of the Constant "A".

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