Chapter 6, Problem 6.15VP

Interpretation Introduction

Interpretation: The given figure shows the distribution of molecular speeds of ${\text{CO}}_2$ and ${\text{SO}}_2$ molecules at $25°\text{C}$. The curve for ${\text{SO}}_2$ and the curve which is comparable with the propane, a common fuel in portable grills 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.
• Particle present in gas have point masses with zero volume.
• 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.

A molecular weight is the sum of all the atomic weight of the atoms present in molecules.

To determine: The curve for ${\text{SO}}_2$ and the curve which is comparable with the propane, a common fuel in portable grills.