3900_2011_PS8

3900_2011_PS8 - Problem Set 8 Chem 3900: Physical Chemistry...

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1 Problem Set 8 Chem 3900: Physical Chemistry II Spring 2011 (SBEF.JU.ZPVSTFMG!IPNFXPSL! "OTXFST!XJMM!CF!QPTUFE!5VFTEBZ-!"QSJM!23 UI Problem 1. A useful model for treating non ideal binary solutions is the regular solution model (cf. exercises 24 37 through 24 ܲ ൌݔ ܲ כ ݁ ௪௫ ோ் ܲ ൌݔ ܲ כ ݁ ௪௫ ோ் for partial pressures P i in terms of the liquid phase mole fractions x i , where w is a constant with dimensions of energy. (The physical significance of w is discussed in 37.) i) In class we showed that in a non ideal binary solution in which one component is very concentrated, one component obeys Raoult’s Law, while the other obeys Henry’s Law. Show that this is true for the regular solution model. ii) Determine the activities and activity coefficients for component 1, using the Raoult’s Law and Henry’s Law conventions. In each case, show that the activity coefficient approaches 1
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This note was uploaded on 08/25/2011 for the course CHEM 3900 taught by Professor Park during the Spring '08 term at Cornell.

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3900_2011_PS8 - Problem Set 8 Chem 3900: Physical Chemistry...

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