25-HENRY'S LAW 1.pptx

henry law

1. HENRY’S LAW HUSNA SHAFIQ H1903025

2. British chemist WILLAM HENRY He was notable for formation of H enry’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: P α C 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 .

10. THANK YOU