What is the molar heat of vaporization and condensation?
The amount of heat needed to vaporize one mole of a given liquid is known as the molar heat of vaporization (ΔHvap). Condensation is the exact opposite of vaporization. The amount of heat released when 1 mol of vapor condenses is called its molar heat of condensation (DHcond).
What is molar heat of evaporation?
The molar heat of vaporization is the energy needed to vaporize one mole of a liquid. The units are usually kilojoules per mole, or kJ/mol.
What is the definition of molar heat of fusion?
Molar enthalpy of fusion is the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure. It is also known as the molar heat of fusion or latent heat of fusion. Molar enthalpy of fusion is expressed in units of kilojoules per mole (kJ/mol).
What is the molar heat of fusion of water?
6.02
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 the meaning of latent heat of condensation?
Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. The latent heat of condensation is defined as the heat released when one mole of the substance condenses.
What is the molar heat of condensation of ammonia?
23.35KJ/mol\]
The molar heat of vaporization of ammonia is given in literature as \[23.35KJ/mol\] . Thus the molar heat of condensation for one mole of ammonia is \[ – 23.35KJ/mol\].
What does heat of condensation mean?
Definition of heat of condensation : heat evolved when a vapor changes to a liquid specifically : the quantity of heat that is evolved when unit mass of a vapor is changed at a specified temperature to a liquid and that equals the heat of vaporization.
What is latent heat of condensation?
What is the difference between molar heat of fusion and molar heat of vaporization?
Heat of fusion is the energy needed for one gram of a solid to melt without any change in temperature. Heat of vaporization is the energy needed for one gram of a liquid to vaporize (boil) without a change in pressure.
What is the molar heat of solution?
⚛ Molar heat of solution, or, molar enthalpy of solution, is the energy released or absorbed per mole of solute being dissolved in solvent. ⚛ If heat is released when the solute dissolves, temperature of solution increases, reaction is exothermic, and ΔH is negative (ΔH < 0).
What is latent heat in chemistry?
latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.