Chapter 13, Problem 13.57QP

Interpretation Introduction

Interpretation: Volume of antifreeze Ethylene glycol added to car radiator having $\text{6}\text{.50L}$ at $\text{-20°C}$ to be determined and boiling point of water-Ethylene glycol to be calculated.

Concept introduction

Boiling point is the temperature at which liquid turns into a gas.  Example: boiling point of water is $\text{100°C}$.  That is water changes from liquid phase to gas phase.

${\text{ΔT}}_{\text{b}}{\text{= T}}_{\text{b}}{\text{- T}}_{\text{b}}^{\text{°}}$

Where,

${\text{ΔT}}_{\text{b}}-$ Change in boiling point

${\text{T}}_{\text{b}}\text{ - }$ Boiling point of the solution

${\text{T}}_{\text{b}}^{\text{°}}\text{ - }$ Boiling point of pure solvent

Boiling point elevation$(\Delta T_b)$  is distinction between boiling point of the pure solvent ${\text{(T}}_{\text{b}}^{\text{°}}\text{)}$ and the boiling point of the solution ${\text{(T}}_{\text{b}}\text{)}$.

${\text{ΔT}}_{\text{b}}{\text{= K}}_{\text{b}}\text{m}$

Where,

${\text{ΔT}}_{\text{b}}-$ Change in boiling point

${\text{K}}_{\text{b}}-$ Molal boiling point constant

m- Molality of the solution

Volume: A quantity of the substance which occupies three dimensional space within the container. The formula used to determine volume is,

$\text{Volume =}\frac{\text{mass}}{\text{density}}$