Chapter 13, Problem 56A

Interpretation Introduction

Interpretation: The reason of gas behaving non-ideally on decreasing the volume of gas is to be discussed.

Concept introduction:

This is based on kinetic theory of gases.

Answer to Problem 56A

When volume of a gas is decreased, the volume occupied by a gas molecule becomes measurable. So, gas deviates from ideal behaviour.

Explanation of Solution

According to kinetic molecular theory, a gas which is ideal follows:

• Volume occupied by a molecule should be negligible as compared to total volume of gas.
• There should be no attractive forces between the gas molecules.

So, when volume is decreased, the gas particles come closer and attractions between the particles increases. So, it behaves no-ideally.

Conclusion

Thus gases deviate from ideal behaviour on decreasing the volume of the gas.