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Ideal Gas Equation

The molecules that make up an ideal gas are in constant random motion. Assumptions:Collisions are elastic, the size of the molecules are negligible compared to the volume of the gas and there are no intermolecular forces.The ideal gas equation is:

pV = nRT


where p is the pressure in Pa, V is the volume in m3, n is the number of moles, T is the temperature in kelvin and the molar gas constant R = 8.314 Jmol-1K-1.

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Specification: OCR Chemistry A (H032), AS-level, 2.1.3 Amount of substance. Topic: Amount of Substance.

Key terms in this lesson

Mole
The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.

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