ProblemSet_9_AnswerKey - Chem 208, Spring 2008 Problem Set...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chem 208, Spring 2008 Problem Set 9 Due Friday, April 18, 2:00 PM Suggested Additional Problems: Ch 19:7, l5, 17, 22, 23,25,3l,35,39, 43,47, Name: 49, 53, 63 Lab TA Name: Lab Time/R00 m: l. The following data was obtained from a reference book (250C). You may assume that ABC} and S0 do not depend on the temperature: Molecule AH of AG 0f S0 (kJ/mol) (kJ/mol) J /mol-K Hg0(s) -90.83 68.539 70.29 Hg(g) 61.32 31.820 174.96 Hg“) 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 100°C (not 25°C) ' I 2 Hg01s)» 2 Hga) + 02(g) 6‘“ H“ 46 ° Wm / AH? [ICON-1(0)] — 2 910.35) .= +181.“ 19:} AS°= [104“) ,L (2.05.1191 — 2670.29) =. + 216.4 "/;< 46 = AH°_TAS¢ ._. +131.“ k3 -; (373 QCOJIM-E) AC7 : (181.66; —- .79) to.) b) In what temperature range (0C) is 1the decomposition of mercuric oxide, Hg0(s), spontaneous? Slim-4... lad-k «AW-AL cs" 70 ) hm mu b‘cm. sparri- est Wfiw—r Ah" -—TAS° <0 AH °< 1'45“ w M” I?!“ = 5‘1 K c) What is the equilibrium constant, K, for the decomposition of mercuric oxide at 25°C? _ AGO: - K- Mfl: 6(0)} IUD] - [1:] AK: —Hz,oaKJ' = #1720819 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(%) <=> N02(g) + 0205) 3) USng data from the appendix in your text, calculate AG0 and K (at 298 K) for this reaction 0 ,_ a a as - Ede (Pr) - Zoe; (2) a (5/3! W +0) ._ (yaw/y + [43.2. if) A6” = 473.4! IJ 46" = “167344.14 ._ mg,qu .1: —— (fiflxw‘if/{gfxzfg/z) fin K b) Calculate AG for the reaction under the following conditions: PM0 : 1.00 x 10'6 atm; PO3 = 2.00 x 10‘6 atm, PNOz = 1.00 x 10'7 atm, PO2 = 1.00 x 10'3 atm. A67 440%an (I #0671: x165) ‘J AG? ‘1 w flag V g + (sigma/o A Clxlo")(ax10") :: —/?§.Slkaf f- hf 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) “9 CH3CH20H(1) 0- C2H6(g) + H20(g) —’ CH3CH20H (1) + H2 (1%) Which would be the more thermodynamically feasible? Why? 5) cauflj) 4' “63(9) we: Cay:th (1) °—— . - .2v '2 <0 AHog —L77-—[32.z1—2w,3] U> AG - “2 T( 7“) mi":- --35-2 U (55' = lGl—(zfi-HB‘?) 'J/g A55 a 4.47% M ii Cal-I; (3)4 I‘éocg) #963494“) +449) AH”: ~278-(-w-7-zw.s) N 4W?" M: +43 143' AS°<0 A50 .-.- Qal+lbI)-(1L7ng) Jflé Ag‘m W A; (0 A5” “27% ... Nan-Sfmele x. L A tam ‘ A441. 4. Carbon monoxide (CO) is toxic because itbinds- muc more 3 ong y to t 6 iron emog 0 1n an does 02. The equilibrium constant for the binding of C0 is 210 times that for binding of 02: (heme)Fe + 02 ¢> (heme)Fe-02 K02 (heme)Fe + CO <2» (heme)Fe—CO KCO Kg)me = 210. Calculate the difference in AGD for the binding of CO and 02 to hemoglobin at 25°C. 440 = «new A96}, = “KT/QMKCQ 5 46% -= -RT£M Kg, [40: e'fi'flr Kai: Cdfi‘nu/KT A ; . . 52 :2” a 6— (War a e(‘%fMo.)/£T Kn. m " = Macias—rm; g Rf ,emzao £44 2.! 0 RT L113)L§¢3N) 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 A80 for the self dissociation of water, given the following data. ‘ C _ I_)_ ._._ _ —-—-'—-- n x T C Kw fig.“ 0 1.14x10'S ‘&—'§&TI 3.36 25 1.00 x1044 — 32 . v/ 3.25 35 2.09x10'l4 nabs—a 3.19 40 2.92 )(10'14 — 31.16 5.10 50 5.47x10'14 - 150.51} flMK ._._ .. A6” _. __. gen—TM”) KT '7 RT : ——_¢_L&L° 95:“ fine R (J? + K in. Em + u 0: Q , ngas. Em 1 88¢ - x850. n h %§;du cam”: "u ...
View Full Document

This note was uploaded on 05/02/2008 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

Page1 / 5

ProblemSet_9_AnswerKey - Chem 208, Spring 2008 Problem Set...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online