Why is the melting point and freezing point of water 0 degree Celsius and is 0 degree celsius warm or cool?

Answer 1

For ice to melt it must absorb heat energy to break down the molecular lattice structure. For water to freeze it must be able to lose heat energy. So whether the water is melting at 0o or freezing at oC depends on whether the surrounding temperature is higher or lower than zero.

Answer 2

First, the freezing/melting point of oxygen is -218.79 C and hydrogen is -252.8 C.

Second, freezing point actually has nothing to do with the freezing points of its constituent elements. Freezing point is based on the intermolecular forces. Water is extremely unique in this regard. The way the O-H bond is formed allows the molecules to actually form weak bonds between the molecules themselves, giving it a much, much higher boiling point than would normally be expected from other, similar compounds such as H2S, which is a gas at room temp and has a boiling point of -86 C.

Answer 3

The Centigrade (or Celsius) temperature scale is based around the freezing and boiling of water, with freezing at 0º and boiling at 100º. Water freezes completely at 0ºC, but melts when the temperature rises above 0ºC.

Answer 4

The melting point and freezing points are equivalents; each compound has specific physical properies, and water also.

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