DOC.

26 THEORY

OF

TETRODE AND SACKUR

131

Translations

of

editorial

notes

[5]

Insofar

as

this

question

can

be

posed

at

all

clearly.

Not the absolute values of

the

entropy

constants

are

thermodynamically defined,

but

always only

the

differences of the

entropy

constants of

two

domains

of

state of

one

and the

same

material

system

are

defined.

[13]

In this

formula,

n

is the number of

degrees

of freedom of the

system,

which

has to be assumed

in

order to

represent

the

actual thermal behavior

of the

system

in the normal

area

that has

to

be considered. The

place

of

the

phase

_E

integral

for

a

"dormant"

degree

of freedom has

to

be taken

by

the value

e

0;

this is

especially

to be considered in

cases

where the

system

has

only

"dormant"

degrees

of freedom

(at

absolute

zero).

Because it is

clear,.