The van der Waal's equation for a real gas may be rearranged to give V^3 - (b + RT/P) V^2 + (a/P) V - ab/P = 0 where V is the molar volume of the gas. Indicate the correct statement(s) amongst the fol

Question

The van der Waal's equation for a real gas may be rearranged to give V^3 - (b + RT/P) V^2 + (a/P) V - ab/P = 0 where V is the molar volume of the gas. Indicate the correct statement(s) amongst the following:

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. The cubic van der Waals equation has three roots for volume. (a) Above Tc, there is only one real root (gas phase) and two complex conjugate imaginary roots. (b) At Tc, all three real roots merge to become identical to Vc. (c) Below Tc, there are three real roots.

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