examkey2-ch302h - CH302H, Sp08, EXAM 2, Page 3 * NAME * #I....

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CH302H, Sp08, EXAM 2, Page 3 *** NAME *** #I. (5 points) Henry's law states that the vapor pressure of a volatile solute (labeled '2') in solution is proportional to the vapor pressure of the pure solute P: as P2 =K~oes the proportionality constant k2 depend: k~ gz On the solvent properties? On the nature of the solute? On both? On neither? #2. (1 0 points) A solution of 0.01 moles of a certain molecular compound causes the freezing point of a solvent to decrease by 0.40 K. A solution of 0.01 moles of an unknown compound B in the same solvent causes a freezing point depression of 0.80K. Give a plausible explanation for the results of the second experiment in light of the first result, assuming that no errors have been made in sample preparation or measurement. - 'lsdycc Al, - d-s~c L ,,fit 0 l- -l.*c 4 &- mu& prs L/& (by -) &C
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CH302H, SpO8, EXAM 2, Page 4 #3. (5 points) True or False: The thermodynamic state of a gas can be specified by the composition, the pressure and volume, and the quantum numbers of all the atoms in the gas. (Give a justification for the answer.) - #4. (5 points) True or False: Both the enthalpy and the pressure are extensive variables of a system.
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This note was uploaded on 10/27/2008 for the course CH 302H taught by Professor Rossky during the Spring '08 term at University of Texas at Austin.

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examkey2-ch302h - CH302H, Sp08, EXAM 2, Page 3 * NAME * #I....

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