2a For a binary mixture at constant temperature and pressure, which of the following relation between activity coefficient (y;) and mole fraction (x;) obeys the Gibbs - Duhem equation for a thermodynamically consistent system? Justify your answer A) In y1 = -1+2x1-X1; In y2 = - X1 B) In yı = -1+2x1-X1; In y2 = x1

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