Gaseous State

Introduction

• Simplest state.
• 11 Gaseous elements in periodic table: Hydrogen, Helium, Nitrogen, Oxygen, Fluorine, Neon, Clorine, Argon, Krypton, Xenon and Redon

2.Kinetic Molecular Model of Gas (KMT).

Five Assumptions for gas particles: 

• No defined volume but with a defined mass. In other words, their volume is very small as compared to distance in between them.
• No intermolecular force. No attraction, No repulsion, No potential energy. Total energy=Kinetic energy.
• Continuous, random motion.
• Elastic collision.
• Kinetic Energy proportional to absolute temperature..

3.Temperature and KMT.

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• Kinetic Energy proportional to absolute temperature.
• Temperature increase, Speed increase, Kinetic energy increase.
• However, it is impossible to define the speed of any one gas particle. As such, the speeds of gases are defined in terms of their root-mean-square speed.

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