CALCIUM IODIDE - (10102-68-8) - Physical Properties • Chemical Properties • Solubility • Uses/Function • Reactions • Thermochemistry

Introduction

Name: calcium iodide
* IUPAC
CAS Number: 10102-68-8
Chemical Formula: CaI₂
Molar Mass: 293.88694 g
Mass Percent: Ca 13.637 %; I 86.362 %

Classification

• inorganic

Bonding

Bonding: ionic
Ionic Character: 50.30 %

Thermochemistry

ΔHf° (s): -128.30 kcal/mol 1 = -536.81 kJ/mol
ΔHf° (ℓ): -119.54 kcal/mol 1 = -500.16 kJ/mol
ΔHf° (g): -61.70 kcal/mol 1 = -258.15 kJ/mol

S° (s): 34.72 cal/(mol•K) 2 = 145.27 J/(mol•K)
S° (ℓ): 42.77 cal/(mol•K) 2 = 178.95 J/(mol•K)
S° (g): 78.26 cal/(mol•K) 2 = 327.44 J/(mol•K)

ΔGf° (s): -127.42 kcal/mol 3 = -533.13 kJ/mol
ΔGf° (ℓ): -121.06 kcal/mol 3 = -506.52 kJ/mol
ΔGf° (g): -73.80 kcal/mol 3 = -308.78 kJ/mol

Reactions

Ca(OH)2 (aq) + 2 NH4I (s) → CaI2 (aq) + 2 H2O (ℓ) + 2 NH3 (g)

For More Information

Wikipedia

Sources

(1) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(2) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(3) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.