CHEM163B_HW6_solutions_2011

CHEM163B_HW6_solutions_2011 - Winter 2011 Chemistry 163B...

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Winter 2011 Chemistry 163B 1 Homework #6 Problems (#30-#36) In this problem set (and in the remainder of Chemistry 163B), you may use the differential expressions for the state functions U, H, A, and G as ‘given’ starting points. 30. [Adapted from Raff #4.30] Using the data in E&R Appendix A, calculate ±Sº for the following readtions: a. CaCO 3 (s) ² CaO(s) + CO 2 (g) b. H 2 (g) + Cl 2 (g) ² 2HCl(g) c. C 4 H 10 (g) [n-butane] + 13 2 O 2 (g) ² 4CO 2 (g) + 5H 2 O(g) d. Discuss the results of each reaction in terms of order-disorder in regard to both the sign of ±Sº for each reaction and the relative magnitudes of ±Sº for the three reactions. 31. a. Prove, in general (but 0; 0 other wd n d ± ²² ), the relationship in equation 3.19 E&R) TV UP TP VT ³³ ´µ ´ µ ²± ¶· · ¸¹ ¸ ¹ b. Evaluate T U V ³ ³ for an ideal gas. c. Evaluate T U V ³ ³ for a Van der Waals gas º» 2 a PV b R T V ¼± ² d. Interpret your (correct!) results for parts (b) and (c).
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CHEM163B_HW6_solutions_2011 - Winter 2011 Chemistry 163B...

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