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The Energetics of Solution Formation

APCHEM-BDUK6V

The table below identifies three energy terms that must be considered in discussing the energy involved in forming aqueous solutions of solid ionic electrolytes.

Term Symbol
Lattice Energy of Solute $\Delta { H }_{ lattice }$
Enthalpy of Solution $\Delta { H }_{ solution }$
Enthalpy of Hydration $\Delta {H}_{hydration}$

$\ $
Which of the following equations CORRECTLY expresses the relationship between the lattice energy of the solid solute, the enthalpy of solution, and the enthalpy of hydration of a solution of an electrolyte in water?

A

$\Delta { H }_{ solution }=\Delta { H }_{ lattice }+\Delta { H }_{ hydration }$

B

$\Delta { H }_{ hydration }=\Delta { H }_{ solution }+\Delta { H }_{ lattice }$

C

$\Delta { H }_{ lattice }=\Delta { H }_{ solution }+\Delta { H }_{ hydration }$

D

$\Delta { H }_{ solution }=\Delta { H }_{ hydration }-\Delta { H }_{ lattice }$