DIBORON TRIOXIDE - (1303-86-2)

Introduction

Name: diboron trioxide
* IUPAC
CAS Number: 1303-86-2
Chemical Formula: B2O3
Molar Mass: 69.6202 g
Mass Percent: B 31.057 %; O 68.942 % 

Classification

• inorganic

Uses/Function

• "Used in the production of borosilicate glass." 1

Bonding

Bonding: polar covalent
Ionic Character: 42.42 %

Thermochemistry

ΔHf° (s): -304.20 kcal/mol 2 = -1,272.77 kJ/mol
ΔHf° (s amorphous): -299.84 kcal/mol 2 = -1,254.53 kJ/mol
ΔHf° (g): -201.67 kcal/mol 2 = -843.79 kJ/mol
S° (s): 12.90 cal/(mol•K) 3 = 53.97 J/(mol•K)
S° (s amorphous): 18.6 cal/(mol•K) 3 = 77.82 J/(mol•K)
S° (g): 66.85 cal/(mol•K) 3 = 279.70 J/(mol•K)
ΔGf° (s): -285.30 kcal/mol 4 = -1,193.70 kJ/mol
ΔGf° (s amorphous): -282.6 kcal/mol 4 = -1,182.40 kJ/mol
ΔGf° (g): -198.85 kcal/mol 4 = -831.99 kJ/mol

Reactions

For More Information

Sources

(1) - Silberberg, Martin S. Chemistry: The Molecular Nature of Matter and Change, 4th ed.; McGraw-Hill: New York, 2006; p 569.
(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) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(5) - Zumdahl, Steven and Zumdahl, Susan A. Chemistry 9th ed.; Brooks/Cole: Belmont, CA, 2014; p 134.