The electron affinity of bromine has been measured by determining the ratio of ions to electrons leaving a hot tungsten surface in contact with bromine gas at low pressure. The value obtained is 80.5±0.4 kcal./mole. The measurements, which extend over a range of 700° in temperature and 80‐fold in pressure, show no trend in the electron affinity and demonstrate that the decomposition of bromine under these conditions is a first‐order reaction. The assumption of unit accommodation coefficient is shown to be correct.

1.
P. P.
Sutton
and
J. E.
Mayer
,
J. Chem. Phys.
3
,
20
(
1935
).
2.
K. J.
McCallum
and
J. E.
Mayer
,
J. Chem. Phys.
11
,
55
(
1943
).
3.
H. B. Weisblatt, Dissertation, Johns Hopkins University, 1938.
4.
P. M.
Doty
,
J. Chem. Phys.
11
,
557
(
1943
).
5.
G.
Bryce
,
Proc. Camb. Phil. Soc.
32
,
648
(
1936
).
6.
H. A.
Jones
and
I.
Langmuir
,
Gen. Elec. Rev.
419
,
310
(
1927
).
7.
C. N.
Hinshelwood
and
R. E.
Burk
,
J. Chem. Soc.
127
,
2896
(
1925
).
8.
C. N.
Hinshelwood
and
C. R.
Prichard
,
Proc. Roy. Soc.
A108
,
211
(
1929
).
9.
C. H.
Kunsman
,
E. S.
Lamar
, and
W. E.
Deming
,
Phil. Mag.
10
,
1015
(
1930
).
10.
C. N.
Hinshelwood
and
C. R.
Prichard
,
J. Chem. Soc.
127
,
1552
(
1925
).
This content is only available via PDF.
You do not currently have access to this content.