Loading....
Coupon Accepted Successfully!

 

Enthalpy of fusion

It is the enthalpy change involved in the conversion of one mole of a substance from solid state to liquid state at its melting point. This equals the latent heat of fusion per gram multiplied by the molar mass.
 
Example

H2O(s) H2O(l); ΔH = 1.44 kcal/mol
 

Enthalpy of vaporization

It is the enthalpy change involved in converting one mole of the substance from liquid state to gaseous state at its boiling point.
 
Example

H2O(l)  H2O(g); ΔH = 10.5 kcal/mol
 

 

Enthalpy of sublimation

It is the enthalpy change involved in the conversion of one mole of a solid directly into its vapor at a given temperature below its melting point.
 
Example

I2(s)  I2(g); ΔH = 14.9 kcal/mol
ΔHsublimation = ΔHfusion + ΔHvaporization

 

Heat of atomization

The amount of heat required for the formation of one mole of atoms in gaseous state from its elements is known as heat of atomization of that element.
 
C(s) C(g); ΔH = 171.7 kcal/mol
H2(g) 2H(g); ΔH = 104 kcal




Test Your Skills Now!
Take a Quiz now
Reviewer Name