Chapter 5, Problem 6RQ

Interpretation Introduction

Interpretation: The explanation for Boyle’s law, Charles’s law, Avogadro’s law and Dalton’s law holds good for ideal gases has to be shown using Kinetic molecular theory and the explanation for relationship between P vs. n (at constant V and T) and P vs. T(at constant V and n) has to be given.

Concept Introduction:

Postulates of Kinetic theory:

1. 1. In a gas, there are a huge number of tiny particles called as molecules of similar size and weight.
2. 2. Unlike solids, the interaction between the molecules are said to be negligible.
3. 3. In a gas, the state of molecules is in random motion with different velocities from zero to infinity in all possible direction.
4. 4.  On comparison with volume of gas, the size of the molecule is negligible.
5. 5. A perfect elastic collision should take place when the molecules collide with each other.
6. 6. A pressure is exerted as the molecules collide on the walls of the container. During the impact of collision, the pressure of gas is the average force per unit area of the molecules. Higher will be the pressure, larger the number of impacts.
7. 7. Because of random motion of molecules in gas, molecules posses kinetic energy that varies as absolute temperature.