COPPER(II) SULFIDE - (1317-40-4) - Physical Properties • Chemical Properties • Solubility • Uses/Function • Reactions • Thermochemistry

Introduction

Name: copper(II) sulfide
* IUPAC
CAS Number: 1317-40-4
Chemical Formula: CuS
Molar Mass: 95.611 g
Mass Percent: Cu 66.463 %; S 33.536 %

Classification

• inorganic

Bonding

Bonding: polar covalent
Ionic Character: 20.61 %

Thermochemistry

ΔHf° (s): -12.7 kcal/mol 1 = -53.14 kJ/mol

S° (s): 15.9 cal/(mol•K) 2 = 66.53 J/(mol•K)

ΔGf° (s): -12.8 kcal/mol 3 = -53.56 kJ/mol

Reactions

CuCl2 (aq) + 1 Na2S (aq) → CuS (s) + 2 NaCl (aq) 4
3 CuS (s) + 8 HNO3 (aq) → 8 NO (g) + 3 CuSO4 (aq) + 4 H2O (ℓ) 5
2 CuS + 1 O2 → Cu2S + SO2 6

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.
(4) - Ebbing, Darrell D. General Chemistry 3rd ed.; Houghton Mifflin Company: Boston, MA, 1990; p 97.
(5) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; p 360.
(6) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; p 386.