   Chapter 13.2, Problem 13.2CYU

Chapter
Section
Textbook Problem

Use the data in Table 13.1 to calculate the enthalpy of solution for NaOH.TABLE 13.1Data for calculating enthalpy of Solution Interpretation Introduction

Interpretation: The enthalpy of solution of NaOH to be identified.

Concept introduction:

Enthalpy of solution: In the process, the change in enthalpy while dissolving the solute in the solvent.

ΔsolnHo = [fHo(Product)]-[fHo(Reactant)]

Explanation

Given:

Enthalpy of formation of NaOH in the solid state = - 425.9 kJ/molEnthalpy of formation of NaOH in the solution    = - 469.2 kJ/mol

The enthalpy of solution:

ΔsolnHo = [fHo(Product)]-[fHo(Reactant)]

NaOH(s)NaOH(aq)

Thus enthalpy can be calculated as;

ΔsolnHo = [f</

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