Chapter 12, Problem 12.75QP

Interpretation Introduction

Interpretation:

The substance that has higher vapor pressure and lowest vapor pressure at ${\text{-10}}^{\text{°}}\text{C}$ has to be identified form the boiling points of the substances given as follows –

Butane,$\text{-0}{\text{.5}}^{\text{°}}\text{C}$; Ethanol,$\text{78}{\text{.3}}^{°}\text{C}$; Toluene,$\text{110}{\text{.6}}^{\text{°}}\text{C}$.

Concept Introduction:

• Vapor pressure of the liquid is defined as the pressure exerted by vapor state when it is in equilibrium with the liquid state.
• Boiling point of a substance is defined as the temperature at which the vapor pressure of the substance becomes equal to the atmospheric pressure.
• A substance with high boiling point has lower vapor pressure.