According to Henry’s law, the mass of gas that dissolves in a given mass of solvent at any temperature is directly proportional to its pressure of the gas above the surface of the solvent.
What is Henry’s law?
Henry’s law is a gas law that states that the amount of gas that is dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid when the temperature is kept constant.
P ∝ C (or) P = kH.C
- ‘P’ denotes the partial pressure of the gas in the atmosphere above the liquid.
- ‘C’ denotes the concentration of the dissolved gas.
- ‘kH’ is Henry’s law constant of the gas.
Henry’s law comes into play every time a bottle of Pepsi (or any other carbonated drink) is opened. The gas above the unopened carbonated drink is usually pure carbon dioxide, kept slightly above the standard atmospheric pressure.