Problem Set 9

Problem Set 9 - Chem 208 Spring 2008 Problem Set 9 Due...

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Unformatted text preview: ' Chem 208, Spring 2008 Problem Set 9 Due Friday, April 18, 2:00 PM Suggested Additional Problems: Ch 1927,15, 17, 22, 23, 25, 31, 35, 39, 43, 47, Name: 49, S3, 63 Lab TA Name: Lab Time/Room: l. The following data was obtained from a reference book (25°C). You may assume that AH? and 80 do not depend on the temperature: Molecule AHOf 156% S0 (kJ /mol) (kJ/mol) J /mol-K HgO(s) -90.83 -58.539 70.29 Hg(g) 61.32 31.820 174.96 Hg(l) 0 0 76.02 02(g) 0 0 205.14 a) Using this data, calculate AG for the decomposition of 2 moles of HgO(s) at 1000C (not 25°C) 2 Hg0(8) "r 2 Hg(1)+ 02(g) b) In what temperature range (0C) is the decomposition of mercuric oxide, HgO(s), spontaneous? c) What is the equilibrium constant, K, for the decomposition of mercuric oxide at 25°C? Chem 208, Spring 2008 Problem Set 9 Due Friday, April 18, 2:00 PM 2. One of the reactions that destroys ozone in the upper atmosphere is: N0(g) + 03(g) ¢> N02(g) + 02(g) a) Using data from the appendix in your text, calculate AG0 and K (at 298 K) for this reaction. b) Calculate AG for the reaction under the following conditions: PNO = 1.00 x 10'6 atm; P03 = 2.00 x 10'6 atm, PN02 = 1.00 x 10'7 atm, P02 = 1.00 x 10'3 atrn. Chem 208, Spring 2008 Problem Set 9 Due Friday, April 18, 2:00 PM 3. Consider the two reactions for the production of ethanol: i— C2H4(g) + H20(g) “r CH3CH20HG) 11- C2H6(g) + H20(g) "’ CH3CH20H (I) + H2 (9 Which would be the more thermodynamically feasible? Why? 4. Carbon monoxide (CO) is toxic because itbinds much more strongly to the iron in hemoglobin than does 02. The equilibrium constant for the binding of CO is 210 times that for binding of 02: (heme)Fe + 02 ¢> (heme)Fe—02 K02 (heme)Fe + C0 <=> (heme)Fe—CO KCO Keg/K02 = 210. Calculate the difference in AGo for the binding of CO and 02 to hemoglobin at 25°C. Chem 208, Spring 2008 Problem Set 9 Due Friday, April 18, 2:00 PM 5. By plotting the data in the appropriate way, determine AH0 and AS0 for the self dissociation of water, given the following data. T °c Kw 0 1.142110“ 25 1.002(10-14 35 2.09)<;10'l4 40 2.92 x10—I4 50 5.47 x 10'14 ...
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Problem Set 9 - Chem 208 Spring 2008 Problem Set 9 Due...

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