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

State of Matter Enthalpy of Formation Entropy
kcal/mol kJ/mol cal/(mol×K) J/(mol×K)
(s) -304.20 2 -1,272.77 12.90 2 53.97
(s amorphous) -299.84 2 -1,254.53 18.6 2 77.82 (g) -201.67 2 -843.79 66.85 2 279.70
State of Matter Gibbs Free Energy Specific Heat
kcal/mol kJ/mol cal/(mol°C) J/(mol°C)
(s) -285.30 3 -1,193.70 2
(s amorphous) -282.6 3 -1,182.40 2 (g) -198.85 3 -831.99 2
State of Matter
(s)
(s amorphous) (g)

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.

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