Science Fair Project Encyclopedia
Dinitrogen trioxide
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| Name | Dinitrogen trioxide |
| Chemical formula | N2O3 |
| Appearance | Blue liquid |
| CAS number | 10544-73-7 |
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Physical |
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| Formula weight | 76.01 amu |
| Melting point | 171 K (-102 °C) |
| Boiling point | 276 K (3 °C) |
| Density | 1.4 ×103 kg/m3 (liquid) |
| Odor | Slightly irritating |
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Thermochemistry |
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| ΔfH0gas | 91.200 kJ/mol |
| ΔfH0liquid | |
| S0gas, 1 bar | 314.626 J/mol·K |
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Safety | |
| Ingestion | Hazardous due to decomposition to toxic gases |
| Inhalation | Hazardous due to decomposition to toxic gases |
| Skin | May burn and stain skin yellow due to decomposition to NO2 |
| Eyes | Will cause severe burns |
| More info | Hazardous Chemical Database |
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SI units were used where possible. Unless otherwise stated, standard conditions were used. | |
The chemical compound dinitrogen trioxide (chemical formula: N2O3) is a pale blue liquid, and is unstable above 3°C (37° F) at standard pressure. It melts at -102°C (-152°F) and boils/decomposes at 3°C (37°F). The liquid at 2°C has the density 1.4 g/cm3.
Dinitrogen trioxide is produced by mixing equal parts of nitric oxide (NO) and nitrogen dioxide (NO2), and cooling the mixture below -21°C (-6°F). The gases react, forming the blue liquid N2O3. Dinitrogen trioxide is only stable in the liquid and solid phases, and decomposes back to NO and NO2 when heated above 3°C.
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10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details