Physical Properties of ClO2
- Introduction
- Chlorine dioxide is a greenish yellow gas having a pungent odor that is distinctive from chlorine. Physical property information for ClO2 is summarized below.
- Indentification
| Name |
Chlorine Dioxide |
| Synonyms |
"Chlo-2", chlorine oxide, chlorine peroxide |
| Formula |
ClO2 |
| Molecular Weight |
67.4518 |
| CAS No. |
10049-04-4 |
- Structure
-
| Bond Angle |
117.5° |
| Bond Length |
0.147 nm |
| Dipole Moment |
5.95x10-30 C*m |
| Acentric Factor |
0.35638 |
| Radius of Gyration |
2.8030x10-10 m |
| Structure |
 |
 |
- Physical State Properties
-
| Appearance |
Yellow-green to orange-red gas
Red crystalline solid |
| Usual Shipping State |
Generated on-site; shipping is not permitted |
| Melting / Freezing Point |
-59.5°C (-75.1°F) |
| Boiling Point |
10.9°C (51.6°F) at 760 mmHg
 9.9°C (49.8°F) at 731 mmHg |
| Critical Temperature |
192°C (377.6°F) |
| Critical Pressure |
8621.6kPa (1250.6 psia) |
| Triple Point Temperature |
-59.5°C (-75.1°F) |
| Triple Point Pressure |
1.2544 kPa (9.4 mmHg abs) |
- Thermodynamic Properties
| Heat of Formation |
24.50 kcal/gm-mole |
| Gibbs Energy of Formation |
28.80 kcal/gm-mole |
| Ideal Gas Entropy |
0.257kJ/gm-mole K |
| Net Heat of Combustion (gas) |
-24.50 kcal/Gm-mole |
| Heat of Solution in Water |
6.6 kcal/gm-mole |
| Liquid Molar Volume |
4.1852x10-2 m3/kmol |
- Densities
| Gas |
3.09 g/l at 11°C |
| Liquid |
1.773 g/mL at -55°C
1.640 g/mL at 0°C
1.614 g/mL at 10°C |
- Temperature Dependant Properties
| Gas Heat Capacity |
0.0408 kJ/(gm-mole K) at 0°C
0.0417 kJ/(gm-mole K) at 20°C
0.0425 kJ/(gm-mole K) at 40°C |
| Heat of Vaporization |
26.937 kJ/gm-mole at 0°C
25.825 kJ/gm-mole at 20°C
24.629 kJ/gm-mole at 40°C |
|
