Chapter 12, Problem 12E

Interpretation Introduction

Interpretation:

The lattice energy of potassium nitrate is given to be $-163.8\text{kcal}/\text{mol}$ and heat of hydration is $-155.5\text{kcal}/\text{mol}$ . The amount of potassium nitrate dissolved in water to absorb $1.00\times {10}^2\text{kJ}$ of heat is to be calculated.

Concept introduction: The heat of solution is calculated by the formula,

  $\Delta H_{\text{soln}}=\Delta H_{\text{solute}}+\Delta H_{\text{Hydration}}$

To determine: The amount of potassium nitrate dissolved in water to absorb $1.00\times {10}^2\text{kJ}$ of heat.