1264
R. BOYD, S. SANWAL, S. SHARY-TEHRANY, AND D. MCNALLY
Table I1 : Expected and Observed Values of AS and Pressure Dependence of AG for Various Ionization Mechanisms -----AS, Expected
Reaction
+
+30
NaAlCla = Na+ AIClaNaAlC14 $. AICll = NaA1Cl8+ A1C14NaAlC14 AlzCla = NaAl2Cl6+ A1Cl42NaAlCla = NaZAlCl4+ AlCL-
+
a
+
+ +
0 0 0
cal deg -I----, Observeda
7.6 f 3 . 1 4 . 6 f3 . 1 33.1 f 3 . 3 -9.9 k 4 . 3
A H , kcal, observeda
76.5 f 2 . 8 72.9 f 2 . 8 96.5 zt 2.9 53.7 f 3.9
----Coefficient F statistic
33 5.6
0.57 11.6
.--a
Probability
