Question

The solubility of gases in liquids

• A. Increases with the rise in temperature
• B. Decreases with the rise in temperature
• C. Increases with lowering the temperature
• D. Decreases with lowering the temperature

Hint:

Warm soda goes flat faster because the $CO_2$ is less soluble at higher temperatures.

Answer 1

The Correct Option is B

Step 1: Concept
The dissolution of a gas in a liquid is generally an exothermic process ($\Delta H < 0$).

Step 2: Analysis
According to Le Chatelier's Principle, for an exothermic process, increasing the temperature shifts the equilibrium toward the reactants (undissolved gas).

Step 3: Reasoning
As kinetic energy increases with temperature, gas molecules are more likely to escape the liquid phase.

Step 4: Conclusion
Therefore, gas solubility decreases as temperature increases. Final Answer: (B)