What is the definition of heat of fusion for water?
3 Heat of Fusion. The heat of fusion of water is unusually high. The heat of fusion is the quantity of heat necessary to change 1 g of a solid to a liquid with no temperature change (Weast, 1964, p. F-44). It is also a latent heat and is sometimes called the latent heat of fusion.
What is the best definition of heat of fusion?
: heat required to melt a solid specifically : the amount required to melt unit mass of a substance at standard pressure.
What is the molar heat of fusion of water?
Molar ΔH (kJ/mol)
| Substance | heat of fusion ΔHfus (kJ/mol) | heat of vaporization ΔHvap (kJ/mol) |
|---|---|---|
| methanol | 3.17 | 35.2 |
| nitrogen | 0.715 | 5.60 |
| sodium | 2.60 | 97.42 |
| water | 6.02 | 40.7 |
What is an examples of heat of fusion?
The most common example is solid ice turning into liquid water. This process is better known as melting, or heat of fusion, and results in the molecules within the substance becoming less organized.
What variable is heat fusion?
The heat of fusion, also known as the latent heat of fusion, is a category of latent heat describing the energy for the phase change between a liquid and a solid to occur without a change in temperature. To fully grasp this concept, let’s first review latent heat.
What is the latent heat of fusion of water?
334 Joules per gram
We know that the Latent heat of fusion of water is 334 Joules per gram or 334000 Joules per Kilogram.
What is the purpose of heat of fusion?
2.3. The heat of fusion is the amount of heat required to melt the frozen solvent. It can be used to determine the freezing point depression of solute.
Why does water have a high heat of fusion?
Water’s high heat of vaporization is thanks to those pesky hydrogen bonds. Water molecules at the surface need to be moving really fast to break free into the air. Heating increases the movement of the molecules, but we already know it takes a lot of energy to heat water because water has a high specific heat.