090406_Homework9 - 0.1710 184.4 0.6535 0.2550 156.0 0.7905...

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Chem340 Physical Chemistry for Biochemists Dr. Yoshitaka Ishii Homework 9 Due Date Apr. 15 (Wed), 2009 P8.3-5, P8.7, P8.10, P8.18 * , P8.20, P8.22, P8.32, P8.36, P8.45 Note: Change P8.18 as “The partial molar volumes of water and ethanol in a solution with x H2O = 0.60 at 25 C are 17.0 and 57.0 …. .” Q1. (Modified from P8.15) The data in the Table below shows the vapor pressure of water (component A) and methanol (B) at 39.9°C. x A y A P (Torr) 0.0490 0.0175 257.9 0.3120 0.1090 211.3 0.4750
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Unformatted text preview: 0.1710 184.4 0.6535 0.2550 156.0 0.7905 0.3565 125.7 (a) Plot P vs X A . By fitting the data to a linear curve, obtain P A * and P B * assuming that the solution is an ideal solution. (b) The actual vapor pressure of pure water is 55.03 Torr and that of methanol is 255.6Torr at 39.9 °C. Using the vapor pressures and the data from the table above, calculate the activity coefficients for both components using a Raoult’s law standard state. Make a table. Q2. Solve P8.16...
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This note was uploaded on 04/14/2010 for the course CHEM 340 taught by Professor Yoshitakaishii during the Spring '07 term at University of Illinois, Urbana Champaign.

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