The melting suggest of water is 0 °C, 32 °F, or 273 K.

You are watching: Melting point of ice in kelvin

The melting suggest of water is the temperature where solid ice alters into liquid water, i m sorry is 0 °C, 32 °F, or 273 K.

### Difference in between Freezing allude and melting Point

For the many part, the freezing point and melting allude of water room the very same temperature. But, occasionally the freezing point is much lower than the melting point. Water experience supercooling. Supercooling is when an extremely pure water, complimentary of disappear gases or impurities, lacks nucleation sites that enable ice formation. Supercooling possibly lowers the freezing allude of water as low together −48.3°C or −55°F!

### Effect of press on the Melting allude of Water

Pressure affect the cook point, freezing point, and also melting point of water. Two means to calculation the effect of pressure on melting point are consulting a phase diagram and also using the Clausius-Clapeyron equation, which relates pressure and temperature between two phases of matter. Boosts pressure lowers the melting suggest of water. For example, at 800 bars (11603 psi) of pressure, the melting suggest of water is -6.9 °C. As you decrease pressure, at some point you reach a suggest where solid ice cream vaporizes rather than melts right into a liquid.

### Other components That influence the Melting allude of Water

In addition to pressure, various other factors affect melting point, including impurities, the structure of the ice, and the beginning size of the solid.

Impurities disrupt the bonds in between molecules, make it less complicated to overcome intermolecular forces in between them. In water and also most other compounds, impurities rise the the melt point. So, dirty ice cream melting at a higher temperature than pure ice.

The familiar kind of solid water is hexagonal ice cream (ice Ih), but water molecule organize into other crystal creates that have different melting points.

In nanoscale ice, the phenomenon that melting point depression comes into play. Melting allude depression is the lowering the the melting suggest with palliation in sample size. In the day-to-day world, ice consists of many water molecules, so melting point depression is not an issue. But, if you only have actually a couple of water molecules, the melting suggest lowers due to the fact that the ice has actually a bigger surface to volume proportion than normal. The cohesion in between a few molecules increases, making the harder to separate them and change phase. Basically, the water molecule bind more strongly to every other because they don’t have actually as numerous neighbor molecules influencing them through intermolecular forces.

Melting allude depression is a really different procedure from freezing suggest depression, in which impurities lower the freezing suggest of a substance. Together stated, impurities raise rather than lower the melting suggest of ice.

See more: The Temptations Build Me Up Buttercup, Build Me Up Buttercup Paroles

### References

Haynes, william M., ed. (2011). CRC Handbook that Chemistry and Physics (92nd ed.). CRC Press. ISBN 978-1439855119.