Enthalpy of Solution — Quiz

Question 4 • 26-27 - C - RUSD Chemistry in the Earth System

Which formula can be used to calculate the enthalpy of solution?

Answer

triangle cap h sub sol is equal to triangle cap h sub solute minus triangle cap h sub solvent

triangle cap h sub sol is equal to triangle cap h sub solute plus triangle cap h sub solvent plus triangle cap h sub mix

triangle cap h sub sol is equal to triangle cap h sub solute plus triangle cap h sub solvent

triangle cap h sub sol is equal to triangle cap h sub solvent plus triangle cap h sub solvent plus triangle cap h sub solute

Explanation

The enthalpy of solution includes the energy changes for separating the solute particles, separating the solvent particles, and mixing them together. Therefore, ΔH₍sol₎ = ΔH₍solute₎ + ΔH₍solvent₎ + ΔH₍mix₎. Choice B gives this complete formula; the other choices omit or repeat a term.

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