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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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