Perry’s Chemical Engineers’ Handbook, Eighth Edition

Heats of Solution

Heats of Solution

Table 2-182: Heats of Solution of Inorganic Compounds in Water

Heat evolved, in kilocalories per gram formula weight, on solution in water at 18 C. Computed from data in Bichowsky and Rossini, Thermochemistry of Chemical Substances, Reinhold, New York, 1936.

Substance

Dilution [*]

Formula

Heat, kcal/mol

Aluminum bromide

aq

AlBr 3

+85.3

chloride

600

AlCl 3

+77.9

600

AlCl 3 6H 2O

+13.2

fluoride

aq

AlF 3

+31

aq

AlF 3 H 2O

+19.0

aq

AlF 3 3 H 2O

1.7

iodide

aq

AlI 3

+89.0

sulfate

aq

Al 2(SO 4) 3

+126

aq

Al 2(SO 4) 3 6H 2O

+56.2

aq

Al 2(SO 4) 3 18H 2O

+6.7

Ammonium bromide

aq

NH 4Br

4.45

chloride

?

NH 4Cl

3.82

chromate

aq

(NH 4) 2CrO 4

5.82

dichromate

600

(NH 4) 2Cr 2O 7

12.9

iodide

aq

NH 4I

3.56

nitrate

?

NH 4NO 3

6.47

perborate

aq

NH 4BO 3 H 2O

9.0

sulfate

?

(NH 4) 2SO 4

2.75

sulfate, acid

800

NH 4HSO 4

+0.56

sulfite

aq

(NH 4) 2SO 3

1.2

aq

(NH 4) 2SO 3 H 2O

4.13

Antimony fluoride

aq

SbF 3

1.7

iodide

aq