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fall 09 exam 3 - Chemistry 3321 Physical Chemistry I Fall...

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Chemistry 3321 Physical Chemistry I Fall, 2009 Exam 3 December 7,20Q Name WORK ANY 4 PROBLEMS. CIRCLE THOSE YOU WANT GRADED. OTHERWISE THE FIRST 4 WILL BE GRADED. *- 'f *z''' r-*' il:c = # (atO, n positive integer) 0 *n - ' 1 '3'5"'(2n -l) -E 6rO,n positive integer) )x2,e-*'dx:L zn+t an \ o 0 @ / ',V ln-*, d* =[ n 1" J" ' -14") A/ ,fr(r.r) : ---t'-s v r-r2/4Dr 2A(nDt)/2 . ( m 1% 2 -mv2t2k-t Ffu\dv=44T| -t ve -dv l2nkuT ) dNldt l; P u^-- t.-,,,---a- uc A 4"'*" (zrmkrr)/, PV = NkBT (ideal gas law) ka=I.38 x 1U23J/K R = 0.082 L-atm/mol-K = 8.314 J/mol-K = 1 .98 cal/mol-K 1 .01 x 1Os Pa = 1 atm = 760 torr 9 K
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1. Consider the following reaction : SOzClz(g) + SOz(9) + Clz(g) Total pressure was followed as a function of time and the following data was obtained: Time (h) 0 3 6 I 12 15 Prot"r(kPa) 11.47 14.79 17.26 18.90 19.99 20.71 c o o.??(6 6.Bsq O.1o1 o.to1 o.Q10 Pro,r,, li.o ? J.-{S L\.9 j ?.'lq 1- t3 [. +rl a. b. Derive expressions for ( and Pro,r,,, where ( is the extent of reaction (0'(<1) and P*,rr,is the partial pressure of SOzClz(g). Using these expressions fill in the numerical values in the table. Determine the order and rate constant for the reaction.
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