What Are The Freezing And Boiling Points Of Water

Freezing occurs when a liquid changes to a solid.

Water s boiling point is the temperature of 100 degrees celsius. The only known liquid that does not freeze even at absolute zero is liquid helium unless it is under pressure. The temperature may be lower if supercooling occurs or if there are impurities present in the water which could cause freezing point depression to occur. The normal boiling point of water is 100 o c because this is the temperature at which the vapor pressure of water is 760 mmhg or 1 atm.

Ordinarily the freezing point of water and melting point is 0 c or 32 f. Under normal conditions when the pressure of the atmosphere is approximately 760 mmhg water boils at 100 o c.