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InterviewSolution
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Solubility of a gas in a liquid solvent increases withA. decrease of pressure as well as temperatureB. increase of pressure and decrease of temperatureC. decrease of perssure and increase of temperatureD. increase of pressure as well as temperrature |
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Answer» Correct Answer - 2 Changing the pressure has no appreciable effect on the solubilites of either solids or liquids in liquids. However, the solubilitier of gases in all liquid solvents increase as the partial pressures of the gases increase. A carbonated benerage is produced by dissolving `CO_(2)(g)` in beverage solution under pressure. More `CO_(2)(g)` dissolves at the higher pressure than otherwise. When we open a can of carbonated drink, undissolved `CO_(2)(g)` escapes and the bubbles of excess dissolved `CO_(2)(g)` immediately come fizzing of solution because the pressure of undissolved `CO_(2)` in the can drops and hence `CO_(2)(g)` suddenly becomes less soluble. The solibility of gases in water usually decreases with increasing remperature. One consequence of this decreased solubility is that carbonated drinks bubble continously as they warm up to room temperature after being refrigerated. Soon, they lose so much dissolved `CO_(2)` that they become "flat". A much more important consequence is the damage to aquatic life that can result from the decrease in concentration of dissolved `O_(2)(g)` in lakes and rivers when hot `H_(2)O` is discharged from industrial plants, an effect known as thermal pollution. |
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