The Gaseous State

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The Gaseous State

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Content

• Ideal gas behaviour and deviations from it

• pV = nRT and its use in determining a value for Mr

• Dalton’s Law and its use in determining the partial pressures of gases in a mixture

Learning Outcomes

Candidates should be able to:

(a) state the basic assumptions of the kinetic theory as applied to an ideal gas

(b) explain qualitatively in terms of intermolecular forces and molecular size:

(i) the conditions necessary for a gas to approach ideal behaviour

(ii) the limitations of ideality at very high pressures and very low temperatures

(c) state and use the general gas equation pV = nRT in calculations, including the determination of Mr

(d) use Dalton’s Law to determine the partial pressures of gases in a mixture (see also Section 9)