Concept explainers
Interpretation:
The substance which has higher vapour pressure from
Concept Introduction:
Vapour pressure of a liquid: Vapour pressure is defined as the pressure exerted by vapours of liquids when the equilibrium is established between liquid and its vapour.
The vapour pressure of a liquid is inversely proportional to the strength of the intermolecular forces present.
The stronger the intermolecular forces, closer will be the molecules in contact and thus higher will be the boiling point and melting point of the substance.
Three types of intermolecular forces:
- London dispersion
- Dipole-dipole
- Hydrogen bonding
Hydrogen bonding: It is an unusual strong intermolecular force occurs between a hydrogen atom and an electronegative atom like nitrogen, oxygen or fluorine.
It occurs in both water and ammonia
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