Heat of Formation of the Alkali Metal Halides

Compound	Heat of Formation, kJ/mole
LiF	-612
LiCl	-409
LiBr	-350
LiI	-271
NaF	-569
NaCl	-411
NaBr	-360
NaI	-288
KF	-562
KCl	-436
KBr	-392
KI	-328
RbF	-549
RbCl	-430
RbBr	-389
RbI	-328
CsF	-531
CsCl	-433
CsBr	-395
CsI	-337