Explain, in terms of the relative strengths of particle–particle interactions before…

CHEMISTRY · Subjective · AP · Chemistry · Compound Structure and Properties · Compound Structure and Properties

Problem

Explain, in terms of the relative strengths of particle–particle interactions before and after dissolution, why dissolving

\text{CaCl}_2

in water releases heat whereas dissolving

\text{KNO}_3

in water absorbs heat.