Q. Out of the following, in which vessel will the temperature of the solution be higher after the salt is completely dissolved
A) $A$
B) $B$
C) Equal in both
D) Information is not sufficient
Explanation
(b) When salt crystals dissolve, crystal lattice is destroyed. The process requires a certain amount of energy (latent heat) which is taken from the water.
In vessel $(B),$ a part of intermolecular bonds has already been destroyed in crushing the crystal. Hence less energy is required to dissolve the powder and the water will be at higher temperature
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.