A-to-Z Guide to Thermodynamics,
Heat & Mass Transfer, and Fluids Engineering
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Nitrous Oxide (N2O) is a colorless, asphyxiant gas that is commonly known as laughing gas. It is only slightly soluble in water and is produced by the thermal decomposition of ammonium nitrate. It forms explosive mixtures with air. Its main uses are as an anaesthetic and as a propellant.

Molecular weight: 44.01Critical temperature: 309.58 K
Melting point: 182.3 KCritical pressure:7.159 MPa
Boiling point:184.7 KCritical density: 452 kg/m3
Normal vapor density:1.96 kg/m3(@ 0°; 101.3 kPa)
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