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Why does solubility of most gases in liquid decrease with rise in temperature? Why does solubility of most gases in liquid decrease with rise in temperature?
Solubility of gases in liquid decreases with rise in temperature can be explained as follows:- Attractive intermolecular interactions in the gas phase are essentially zero for most substances. When a gas dissolves, it does so because its molecules interact with solvent molecules. Because heat is released when these new attractive interactions form, dissolving most gases in liquids is an exothermic process (?Hsoln<0). Conversely, adding heat to the solution provides thermal energy that overcomes the attractive forces between the gas and the solvent molecules, thereby decreasing the solubility of the gas.The phenomenon is similar to that involved in the increase in vapor pressure of a pure liquid with increasing temperature. In the case of vapor pressure, however, it is attractive forces between solvent molecules that are being overcome by the added thermal energy when the temperature is increased.Thanks & regardAarti Guptaaskiitians Faculty
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