Chapter Seven : Kinetic Theory of Gases

1- Postulates of kinetic theory of gases:
- Gas molecules are perfectly elastic minute spheres, there volumes are neglegable compared to the volume they occupy:
- The intermolecular spaces, spacing gas molecules, are large enough to make the attraction forces very small and can be neglected.
- The gas molecules are in continuous motion as described by "Brown " in the " Brownian motion ".
- All collissions with each other or with the walls of the container are perfectly elastic.

2- The mole of any substance equals the molecular mass number in grams.
3- Avogadro's number is the number of molecules in one mole and equals 6.032 x 10 ²³

4- The gas density :

Chapter Seven : Kinetic Theory of Gases BR640057

Chapter Seven : Kinetic Theory of Gases BR640057

5- The pressure of an enclosed gas: Chapter Seven : Kinetic Theory of Gases BR640058

6- The K.E. of one molecule is taken as a measure to the temperature at Kelvin Scale.

Chapter Seven : Kinetic Theory of Gases BR640059

R is the general gas const = 8.314 J/mole K^o
Chapter Seven : Kinetic Theory of Gases BR-PHE12-0047

9- The mass of one molecule "m":
Chapter Seven : Kinetic Theory of Gases BR-PHE12-0048

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