Chapter 4, Problem 4C.1ST

Interpretation Introduction

Interpretation:

The mass density of a mixture of $\text{20}\text{g}$ water and $\text{100}\text{g}$ of ethanol has to be calculated from figure-$\text{1}$.

Concept Introduction:

Mass density:

Mass density can be defined as the mass per unit volume.

  $\text{ρ}\text{=}\frac{\text{m}}{\text{V}}$

Where,

  $\text{ρ}$ is density

  $\text{m}$ is the mass

  $\text{V}$ is the volume

Partial molar volume:

The partial molar volume can be defined as the contribution that a component of mixture makes to the overall volume of the solution.

Say two components of a mixture A and B have partial molar volumes of ${\text{V}}_{\text{A}}$ and ${\text{V}}_{\text{B}}$ respectively along with the mole fractions ${\text{n}}_{\text{A}}$ and ${\text{n}}_{\text{B}}$ respectively.

The total volume of the solution becomes,

  $\text{V}\text{=}{\text{n}}_{\text{A}}{\text{V}}_{\text{A}}\text{+}{\text{n}}_{\text{B}}{\text{V}}_{\text{B}}$