Question

State the formula relating the pressure of a gas with its mole fraction in a liquid in contact with it.

Answer 1

The formula relating the pressure of a gas with its mole fraction in a liquid is given by Henry’s Law:

P = k_H . χ

Where:

• P = Partial pressure of the gas above the liquid

• χ = Mole fraction of the gas in the liquid

• k_H​ = Henry’s law constant for the gas-liquid system