Table of Contents
Why is heat of vaporization higher than fusion?
The latent heat of vaporization is higher than the latent heat of fusion since gas molecules have the largest intermolecular space and the force of attraction between the molecules is almost negligible. Therefore, more energy is required to convert liquid to gas.
Why is molar heat of fusion smaller than molar heat of vaporization?
5 replies. ” The heat of fusion is smaller than the heat of vaporization because melting requires only enough energy for molecules to escape from their sites in the crystal lattice, leaving other molecular attractions intact.
Does condensation absorb heat?
The condensation is the opposite process of evaporation. The heat of condensation is numerically exactly equal to the heat vaporization, but has the opposite sign. In the case of evaporation, the energy is absorbed by the substance, whereas in condensation heat is released by the substance.
What is the molar heat of fusion of ice?
333.55 J/g
(1) 333.55 J/g (heat of fusion of ice) = 333.55 kJ/kg = 333.55 kJ for 1 kg of ice to melt, plus.
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 happens to heat when water freezes?
When water freezes it gives up some of the water’s energy. This energy that is given up is the latent heat of freezing. When the water was freezing latent heat of freezing energy was being released. Heat energy was actually being released.
How do you use molar heat of fusion?
The molar heat of fusion value is used at the solid-liquid phase change, REGARDLESS of the direction (melting or freezing). Solution: divide the molar heat of fusion (expressed in Joules) by the mass of one mole of water. This value, 334.166 J/g, is called the heat of fusion, it is not called the molar heat of fusion.
What is the molar heat of fusion of ice in kJ mol?
6.01 kJ/mol
The accepted value for molar heat of fusion is 6.01 kJ/mol. 29.