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UNIT 3.6 DEVIATION FROM IDEAL GAS LAW

Chemistry is the study of matter and interactions.  Chemistry overlaps with many other sciences.

Below is the contents for this sub unit.

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DEVIATION FROM IDEAL GAS LAW

Review Kinetic Molecular Theory (KMT) is a model that relates properties of gas to motion of the particles.  There are 3 parts.

1. The KMT theory assumes the size of a particle is negligibly small and therefore has essentially no volume.

2. The average kinetic energy of a particle is proportional to the temperature in Kelvin.  

3. The collision of one particle with another (or with the wall) is elastic.  This assumes no loss of energy or interaction between particles.  

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1 and 3 are lies.  The gas molecules actually do have a volume and deviate the ideal gas law at high pressures and collisions do waste energy especially near condensation.  

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To correct these both the P and V have correction factors.  The a times the square of moles divided by square of volume corrects the attractive force between molecules.  The moles times b is the molar volume correction.  Both a and b are given or determined by experiment.

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