Question
Write the conditions of temperature and pressure when gases deviate most from the ideal behaviour? Write real gas equation for n moles of a gas.

Answer

At low temperature and high pressure, most of gases deviate from ideal gas behaviour.
Real gas equation is $\Big(\text{P}+\frac{\text{n}^2\text{a}^2}{\text{V}}\Big)(\text{V}-\text{ab})=\text{nRT}$

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