82
REVIEWS
OF WEYRAUCH
AND OF
VAN'T
HOFF
Doc.
11
Review
of
J. J.
WEYRAUCH,
"On
the
Specific Heats of
Superheated
Water
Vapor"
("Über
die
spezifischen
Wärmen
des
überhitzten
Wasserdampfes,"
Zeitschrift
des Vereines
deutscher
Ingenieure 48 (1904):
24-28, 50-54. Reprint,
9
pp.)
[Beiblätter
zu
den
Annalen
der
Physik 29
(1905):
240]
[1]
Determinations
made
thus far
of
the
specific
heat
cp
are
presented and
[2]
compared
(I).
Equations
of
state
for
water
vapor
suitable for
practical
[3]
application
are
presented and
discussed (II)
and,
using
those
by
Zeuner,
cp
and
cv
for saturated
steam
(III)
and
cp
and
cv
for arbitrarily
super-
heated
steam
are
derived
thermodynamically. Then
the total heat
and
the
steam
heat
are
determined
(V).
In
(VI)
and
(VII)
there follow the fundamental
equations
of the
theory
of
heat for
superheated steam,
their
application
to
special
cases,
and
several
numerical
examples.
Doc.
12
Review
of
J.
H.
van't
HOFF,
"The
Influence
of
the
Changes
in
Specific Heat
on
the
Work
of
Conversion"
("Einfluss der
Änderungen
der
spezifischen
Wärme
auf die
Umwandlungsarbeit,"
in
Meyer,
S.,
ed., Festschrift.
Ludwig
Boltzmann
gewidmet zum
sechzigsten Geburtstage
20.
Februar
1904.
(Leipzig:
J.A.
Barth,
1904): 233-241)
[Beiblätter
zu
den
Annalen
der
Physik 29 (1905):
240]
The
author
shows
by
way
of
thermodynamics
that the
work
of conversion
E
(supplied
to
the
surroundings)
of
a
system
A
into
a
system
B
(e.g.,
by
melting)
in
isothermal conversion
can
be represented in the
form
E
= E0
+
AT
-
ST
lg
T.