At exactly the critical temperature, critical pressure, and critical volume, the theoretical critical compressibility factor () for any gas strictly obeying the van der Waals equation evaluates to:

Question

At exactly the critical temperature, critical pressure, and critical volume, the theoretical critical compressibility factor ($Z_c$) for any gas strictly obeying the van der Waals equation evaluates to:

Prashant Kotian · Accepted Answer

Correct answer: B. The critical constants for a van der Waals gas are , , and . Substituting these into the compressibility factor formula , we get .

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