# Write a short note on mean free path of gas molecules size

## Mean free path definition chemistry

For noble gases, the collisions are probably close to being perfectly elastic , so the hard sphere approximation is probably a good one. Every time the ball hits a wall, a collision occurs and the direction of the ball changes Figure 1. What is its density? There are 10 molecules. Go Back Refinement of Mean Free Path The intuitive development of the mean free path expression suffers from a significant flaw - it assumes that the "target" molecules are at rest when in fact they have a high average velocity. It would take a while for the gas to diffuse and spread into the environment. The mean free path is the average distance traveled by a moving molecule between collisions. This is because gas molecules collide with each other, causing them to change in speed and direction. Pressure, temperature, and other factors that affect density can indirectly affect mean free path. It also has a mean free path of 2. Therefore, the mean free path decreases. The ball hits the wall five times, causing five collisions. Therefore, they can never move in a straight path without interruptions. But real molecules may have a dipole moment and have significant electrical interaction as they approach each other.

What is its mean free path? For noble gases, the collisions are probably close to being perfectly elasticso the hard sphere approximation is probably a good one.

But real molecules may have a dipole moment and have significant electrical interaction as they approach each other. Between every two consecutive collisions, the ball travels an individual path.

Analogy Imagine a ball traveling in a box ; the ball represents a moving molecule. What is its density?

## Mean free path and temperature

A gas in a 1 m3 container has a molecular diameter of 0. Therefore, the mean free path decreases. What is its mean free path? But real molecules may have a dipole moment and have significant electrical interaction as they approach each other. Introduction Imagine gas leaking out of a pipe. This figure shows a ball traveling in a box. This decreases the mean free path. There are 10 molecules. It also has a mean free path of 2. Between every two consecutive collisions, the ball travels an individual path.

What is needed is the average relative velocity, and the calculation of that velocity from the molecular speed distribution yields the result which revises the expression for the effective volume swept out in time t The resulting mean free path is The number of molecules per unit volume can be determined from Avogadro's number and the ideal gas lawleading to It should be noted that this expression for the mean free path of molecules treats them as hard spheres, whereas real molecules are not.

Introduction Imagine gas leaking out of a pipe. This decreases the mean free path. Go Back Refinement of Mean Free Path The intuitive development of the mean free path expression suffers from a significant flaw - it assumes that the "target" molecules are at rest when in fact they have a high average velocity.

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