Nitrogen (N2)

Physical properties

Phase at STP  Gas
Melting point     63.23 K ​(−209.86 °C, ​−345.75 °F)
Boiling point     77.355 K ​(−195.795 °C, ​−320.431 °F)
Density     1.2506 g/L (at °C and 1013mbar)

Other properties
Heat of fusion  =  0.72 kJ/mol
Heat of vaporization =   5.57 kJ/mol
Molar heat capacity  =  29.124 J/(mol·K)
In dry air on Earth, by volume nitrogen occupies = 78.08%