1. HENRY’S LAW
HUSNA SHAFIQ
H1903025

2. British chemist
WILLAM
HENRY
He was notable for formation of Henry’s law
in 1803

3. Henry’s Law :
At constant temperature, the amount of a given gas dissolved in a given
type and volume of liquid is directly proportional to the partial pressure of
that gas in equilibrium with that liquid .
The mathematical formula of Henry’s law is given by:
PαC or P=kH x C

4. EXPLANATION
When liquid and gas are combined in a closed vessel, a dynamic
equilibrium exit between the gas molecules and those in liquid.
G as Gas in liquid

5. As the pressure of the gas above the liquid increased
double, the gas molecules become more soluble in the
solvent.

6. As we know,
Thus, the KH is inversely proportional to the
solubility(C).So, a small value of KH indicates the
high solubility whereas ,a high value indicates
the low solubility.

7. The solubility of Oxygen in water is
higher than the solubility of Nitrogen .
Solubility of gases in increasing order:
He<N2<O2

8. LIMITATION:
 The gas should not react chemically with the solvent.
 The gas should not undergo association or
dissociation in the solution.
 The pressure of the gas is not too high and
temperature is not too low.

9. APPLICATIONS:
 In the production of carbonated beverages.
 In underwater diving.
 For climber .