Question

Equation of state of real gases and critical phenomena

Answer 1

(P=aV2)(V-b)=RT is the equation of state for a real gas, where P, V, and T stand for pressure, volume, and temperature, respectively, and R stands for the universal gas constant.

Critical phenomena of real gases:

• The term "critical phenomena" refers to the phenomenon where a gas smoothly transforms into its liquid state at a critical state or critical point. The critical density is the density of the gas at the critical point.

• In the van der Walls equation, the P term in the equation for an ideal gas is changed to P+(a/V2), where the size of the constant a grows in proportion to the intensity of the intermolecular attractive forces.

• You should also be aware that for every gas, the van der Waals constants a and b must be established empirically.

Learn more about real gases:

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