Exam 1 p3 - 5 For the following reaction 2 N205(g —> 4...

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Unformatted text preview: 5. For the following reaction, 2 N205 (g) —> 4 N02 (g) + 02 (g) suppose you are given a table showing concentration of N205 at different times over the course of the reaction at a particular temperature. A similar table is also given for a second temperature. How would you go about determining the activation energy for the reaction? (What steps would you fOHOW?) For (an. unify“: the inieflm’rej (ale, \aw; uppia [A] 1 _&t +[A1u (Zen; 6|th an LA]: —%t + gut-A10 Lisionkr) E‘fi: tat+fil71 (1.45.2!) Pio‘i’fi are Mamie cg [A1 V5? ‘t J QALA] “5' t ) “"‘l ALE) v;' t adhere A: Nzog) Wnkhever gives a. #7033“ We defer-mines order 5;. read-rem w,r.t. A TIM; shape gives £1 — “hue Values at +wc- temperatures 11m, 91 = A i E‘Wn am! A —. Afr/RT; WW; “£56 a... “‘t“‘l‘.‘°“5 ' 1 + 3 climiw‘l'es A ”6' 3“le Ea 6. Consider the following reaction: H202 + 31‘ + 2 H —> I' + 2 H20 (:1) The rate law for this reaction is found to be rate = k [H202] [1’] Two mechanisms are proposed: \Mpori’aat A istimc-HU n 1 1. H202 + I. —) H20 + 01' , . r ‘ 01- + 1.1+ _) H01 Kai; law we ‘1'“ Mg aldfic“ HOI + r + H+ —> 12 + H20 . - r'f’wfs \ b all ‘Hfle r949 , 12 + r —> 13' V” N“ , “6 Gracia one FaiSecl in He Pavel-cw? its II.H202+I'+H+—>H20+HOI (a, “at .10 C+d'D HOI+l'+H+—>I2+H2O ”WW ‘ “A+ 6”; 12 +1- —> 13- Rate: 2: LA? on" ' of the following describes a potentially correct mechanism? echanism I with the first step the rate determining step. .. ' . r (b) Mechanism] with the second step the rate determining step. R“ e 0i ) but: 3 (c) Mechanism II with the first step rate determining. atem,‘tar3 5+2? (d) Mechanism II with the second step rate determining. . \ i: law 1 (6) None of the above could be correct (kit—(“N “9 (“ta W (q 8 A Di: warn“ r 944%” (b) Clearly explain your choice of mechanism. (SN: «me BF HA5 ele mem‘iarA 9ft?) .0 govt LDV‘QOTMS i7. “Hie. (die quJ “mi 3 Show , Time. Uni: reminds Wsi lad R107, 41%;! I- (c) The reaction, 2 H202 -—) 2 H2O + 02 has the following mechanism: H202 + I. —) H20 + 10- H202 + 10- —) H20 + 02 + I“ The catalyst in the reaction is: I ‘ ?regz‘v\f at Qfiinniuj :1? ”Wu cw! 6 M 0i r "V‘ ' The intermediate in the reaction is: __ p . Explain your choices: ID A» flan crates! in cm auriie‘“ 5“? Anal Subsesmcnl‘iij C0n$umeci . ...
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