If dissolving of a solid releases heat, how may solubility change on increasing temperature?
Answer and explanation
Correct answer: It may decrease
For an exothermic dissolution, heat is a product of the process. Increasing temperature can shift the equilibrium toward the undissolved solid and therefore reduce its solubility. The word may is appropriate because the observed trend also depends on the complete thermodynamics of the solute-solvent system. It is not correct to claim that every solid always increases, becomes infinitely soluble, or consumes all solvent on heating.
Frequently asked questions
What is the correct answer to this question?
It may decrease
Why is this the correct answer?
For an exothermic dissolution, heat is a product of the process. Increasing temperature can shift the equilibrium toward the undissolved solid and therefore reduce its solubility. The word may is appropriate because the observed trend also depends on the complete thermodynamics of the solute-solvent system. It is not correct to claim that every solid always increases, becomes infinitely soluble, or consumes all solvent on heating.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
