Chapter 15, Problem 10A

Interpretation Introduction

Interpretation:

The reason of increase in rate of dissolution of a solid in liquid with increase in temperature is to be explained.

Concept introduction:

Rate of dissolution of a solid in a liquid means time taken to dissolve the solid particles in the liquid molecules.

Answer to Problem 10A

Solute-solvent interactions increase on increase in temperature.

Explanation of Solution

With increase in temperature, molecules of solid acquire kinetic energy. They start moving faster and hence interaction between solute and solvent molecules increases which speed the rate of dissolution.

Conclusion

Thus, rate of dissolution of a solid increases with increase in temperature.