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Henry's Law

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The solubility of a gas in any solvent is proportional to the pressure of the gas over the liquid. Here we see a gas in equilibrium between the liquid and vapor phases. When the gas is compressed over the liquid, the solubility of the gas in the liquid increases in proportion to the increased pressure. The relationship between gas pressure and solubility is known as Henry’s Law: Sg = k × Pg Here, Sg is the solubility of the gas, Pg is the pressure of the gas over the solvent, and k is the Henry’s Law constant. This constant is unique to each gas-solvent pair and is temperature dependent.

Duration: 00:46

Published: 11/23/2015

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