The theoretical minimum work required to separate one mol... — Answer & Explanation | PrepBeePakistan

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HomeMCQsChemical Engineering

MEDIUMENGLISHChemical Engineering

The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is__________________?

Correct answer: B

Explanation

The minimum work is related to the Gibbs energy of mixing ($\Delta G_{mix}$), which for separation at constant T and P is $-RT \ln(y_1 y_2)$ when mole fractions are equal.

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