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State Henry’s law for solubility of a gas in a liquid. Explain the significance of Henry’s law constant (KH). At the same temperature, hydrogen is more soluble in water than helium. Which of theni will have a higher value of KH and Why?

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Henry’s law states that the solubility of a gas in liquid at a given temperature is directly proportional to the partial pressure of the gas.

P = KH .x

where P is the pressure of the gas, x is the mole fraction of the gas in the solution and KH is the Henry’s law constant. KH is a function of the nature oIgas.

Higher the value of KH at a given temperature. lower is the solubility of the gas in the liquid. As helium is less soluble in water, so it has a higher value of KH than hydrogen.

Henry’s Law: As dissolution of agar in liquid is an exothermic process, therefore, the solubility should decrease with in increase in temperature.

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