Properties
Liquid air has a density of approximately 870 kg/m3 (0.87 g/cm3), though the density may vary depending on the elemental composition of the air. Since gaseous air has 78% nitrogen and 21% oxygen, the density of liquid air at standard composition is calculated by the percentage of the components and their respective liquid densities (see liquid nitrogen and liquid oxygen). The boiling point of liquid air is approximately 78 K (-195 °C)(-319 F), and it freezes at approximately 58 K (-215 °C)(-355 F). Liquid air is hard to keep at a stable composition, since the oxygen will boil off at a higher temperature than the nitrogen, it can therefore easily become Oxygen rich by condensing Oxygen out of the atmosphere.
Read more about this topic: Liquid Air
Famous quotes containing the word properties:
“A drop of water has the properties of the sea, but cannot exhibit a storm. There is beauty of a concert, as well as of a flute; strength of a host, as well as of a hero.”
—Ralph Waldo Emerson (1803–1882)
“The reason why men enter into society, is the preservation of their property; and the end why they choose and authorize a legislative, is, that there may be laws made, and rules set, as guards and fences to the properties of all the members of the society: to limit the power, and moderate the dominion, of every part and member of the society.”
—John Locke (1632–1704)