If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as__________________?
Correct answer: E. Solubility increases as temperature decreases
- A. Solubility increases as temperature increases
- B. of solution
- C. Solubility is independent of temperature
- D. Solubility increases or decreases with temperature depending on the Gibbs free energy change
- E. Solubility increases as temperature decreases
Explanation
A negative heat of solution indicates exothermic dissolution, so increasing temperature reduces gas solubility at fixed partial pressure. Cooling therefore increases the solubility.
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