Chapter 6, Problem 6.16VP

Interpretation Introduction

Interpretation: The given figure $\text{P}6.15$ shows the distribution of molecular speeds of ${\text{CO}}_2$ at $25°\text{C}$. The curve for ${\text{CO}}_2$ at $-100°\text{C}$ which shows the difference between distributions of molecular speed is to be explained.

Concept introduction: According to kinetic molecular theory postulates,

• Particles present in the gas have consistent and random motion. They collide with each other or the walls of their container.
• The average kinetic energy of every gas particles is directly related to temperature. The speed of gas molecules increases with increase in temperature.
• Molecules having low molar mass will move faster than the molecules with high molar mass.

To determine: The curve for ${\text{CO}}_2$ at $-100°\text{C}$ which shows the difference between distributions of molecular speed.