Write Short Notes On The Behaviour Of Real Gases

In a PV vs p graph of a real gas, a significant deviation from ideal behaviour can be observed. There are two types of deviations from ideal behaviour that can be exhibited by a real gas – positive deviation and negative deviation. These deviations are a result of the interactions between molecules. When the magnitude of the pressure placed on the gaseous substance is very high, the average intermolecular distance between the gaseous molecules decreases and they come closer together. This causes them to strike the walls of their container with lower momentum (since they are pulled back by the intermolecular attractive forces). A real gas can also show deviation from ideal behaviour as a result of the repulsive forces acting on it. Molecules under the influence of these repulsive forces tend to behave like small, impenetrable spheres

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