TEMPERATURE OF THE RATE OP A CHEMICAL CHANGE. 
199 
This form of relation was rejected by Harcourt and Esson for the reasons given 
in the Bakerian Lecture, p. 859. 
The relation _ 
log k = 267 log (T/Ti) +T-07 
gives values of k agreeing Ijetter with those found than tlie values given l)y the 
author. 
IX. “ On the Decomposition of Ozone by Heat,” Berman and Graves, ‘ Roy. 
Soc. Proc.,’ A, vol. 80, p. 366. The values of k are calculated from the relation 
k/k^ = (T/Ti)“, m being 39'6. 
t. 
log k. 
Found. 
Calculated. 
Author. 
40 
2-86 
2-85 
2-86 
60 
3-95 
3-91 
3-86 
80 
4-91 
4-92 
4-86 
100 
5-74 
5-87 
5-86 
120 
6-86 
6-77 
6-86 
The authors’ formula is 
log k — '05t+ "86, 
Avhich is of the same form as the authors’ formula in Y. 
The relation 
log k = 39'6 log (T/Ti) + 2‘85 
gives values of log k agreeing better with those found than the values given by the 
authors. 
The values of m found from the experiments I.-IX. and those given in the 
Bakerian Lecture (B) arranged in ascending order of magnitude are given in the 
following table, with the range of temperature for whicli m has a constant value :— 
m. 
t. 
m. 
t. 
VI. 
2 
10-40 
B. 
20-4 
0-50 
IV. 
7-3 
21-41 
V. 
20-8 
7-24 
VI. 
9 
10-50 
B. 
21-2 
0-40 
B. 
10 
15-19 
VI. 
22-5 
0-60 
VI. 
11 
10-60 
B. 
24-1 
20-30 
VH. 
12-3 
310-512 
HI. 
26-2 
10-32 
VI. 
13 
10-60 
V. 
26-7 
7-25 
VI. 
14 
10-60 
VHI. 
26-7 
0-25 
V. 
14-3 
7-24 
1 . 
28-5 
9-30 
VI. 
15 
15-60 
IX. 
39-6 
40-120 
H. 
18-9 
9-45 
B. 
40-5 
4-30 
