Chapter 12, Problem 40A

Interpretation Introduction

Interpretation:

The effect on density of gas particle in cylinder needs to be explained.

Concept introduction:

Density of gas is directly proportional to mass of gas and inversely proportional to its volume.

Answer to Problem 40A

Density of gas decreases because of gas particles. It occupy more volume per unit mass.

Explanation of Solution

From Piston A to Piston B, volume increases but density decreases at constant molar mass. It can be defined by given formula.

$Density=\frac{M}{V}$.

Thus, density and volume are inversely proportional to each other. If volume increases, density deceases keeping mass constant.

Conclusion

Density depends upon mass and volume of gas.