Why does the solubility of gases in liquids usually decrease when temperature increases?
Answer and explanation
Correct answer: Gas particles become more able to escape from the liquid
Dissolution of a gas in a liquid is generally exothermic. On heating, gas molecules gain kinetic energy, and the equilibrium shifts toward the gas phase, so molecules escape more readily and the dissolved amount decreases. The liquid does not immediately become solid, gas pressure does not automatically become zero, and loss of solvent mass is not the governing explanation. The trend is general, not an absolute rule for every unusual system.
Frequently asked questions
What is the correct answer to this question?
Gas particles become more able to escape from the liquid
Why is this the correct answer?
Dissolution of a gas in a liquid is generally exothermic. On heating, gas molecules gain kinetic energy, and the equilibrium shifts toward the gas phase, so molecules escape more readily and the dissolved amount decreases. The liquid does not immediately become solid, gas pressure does not automatically become zero, and loss of solvent mass is not the governing explanation. The trend is general, not an absolute rule for every unusual system.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
