chapter6b - Chemical Potentials Since the solvent A obeys...

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Chemical Potentials Since the solvent A obeys Raoult’s law, μ A l = μ A + RT ln x A, where μ A is the chemical potential of pure solvent A at the given T. Since the solute obeys Henry’s law, μ B l = μ B g = μ B °(T) + RT lnp B = μ B °(T) + RT ln K B + RT ln x B = μ B * + RT ln x B where μ B * is a function of T (and weakly of p), and is the chemical potential in the hypothetical state where pure B behaves like an ideal dilute solution of B in A.
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Chemical Potential of Solute The expressions for the chemical potentials now can be used to define ideal and ideal dilute solutions.
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We can express x B in terms of molar concentration of the solute, [B]/moldm -3 (For an ideal-dilute solution) x B = a constant × [B] μ B = μ B * + RTln(constant) + RTln[B] μ B = μ B ө + RTln[B]
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Chemical Potential of Solute
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Nonideal Solutions : Activities μ J = μ J + RT ln a J, a J is the activity of J, an ‘effective concentration’ . The standard state is defined by a J = 1. Solvent: a = 1 for the pure solvent at the given T
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This note was uploaded on 02/23/2011 for the course MATH 112 taught by Professor Ritadubey during the Spring '11 term at Amity University.

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chapter6b - Chemical Potentials Since the solvent A obeys...

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