Liquefaction means conversion to liquid. The liquefaction temperature of water ice at 1.00 atm pressure is 0 degrees C because, when heated, it begins to turn to liquid at that temperature. Similarly, oxygen gas will begin to turn to liquid when cooled to a temperature of -183 C. When warmed it changes back to gas at the same temperature, -183 degrees C, making that also its boiling point.
For a given substance at a given pressure, boiling and condensation temperatures are the same and melting and freezing temperatures are the same. Since a substance can become a liquid by either melting of the solid phase or condensation of the gas phase, a liquefaction point can be either a boiling point or a melting point.
No comments:
Post a Comment