When dissolving of a solid absorbs heat, how may its solubility generally change on increasing temperature?
Answer and explanation
Correct answer: It may increase
If dissolution is endothermic, heat behaves like a reactant in the dissolution process. Raising temperature can therefore favour formation of the dissolved state and increase solubility, according to the equilibrium principle. The word may is important because real solubility also depends on lattice energy, hydration and other factors. It is not necessarily controlled only by pressure or forced to zero.
Frequently asked questions
What is the correct answer to this question?
It may increase
Why is this the correct answer?
If dissolution is endothermic, heat behaves like a reactant in the dissolution process. Raising temperature can therefore favour formation of the dissolved state and increase solubility, according to the equilibrium principle. The word may is important because real solubility also depends on lattice energy, hydration and other factors. It is not necessarily controlled only by pressure or forced to zero.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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