MT1.f2k7.pg4

MT1.f2k7.pg4 - 92 kJ/mol. If the enthalpy change for a)...

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Y Midterm l, Form B-Fall 2007-Johnson The following question refers to the reaction between nitric oxide and hydrogen 2NO+H2-N2O+H2O Initial Rate of Initial [NO] Initial [H2] Disappearance ofNO Experiment (moVL) (mol/L) (mol/L.s) I f-2.2 x l0-3 6.4 x tf3 -f i 2.6 x l0-5: z qt l 2.2xt0-3 l2.8xl0-3)"v,, l.0xl0-4 i 3 - \- 4.5 x l(F3 6.4 x I0-3 , 5.t x l0-5 18. (6 pts) What is the rate law for this reaction? a)-Rate:eNol - - y -" b-1-L b) Rate: &FIl2 7 c) Rate : fr[NO]2[Hz] - n''lL d) Rate: rNoltH2l2 - Jl -, -L .-.*y"X"t" : ft [N2 O] [H2O] -c "' nt t"o\t \-\' '\ nC 1 6-" 1'-' r n -b.tt f' 4, ?1_ e) cannot calculate because the concentration ofreactant is not given 20. (6 pts.) An elementary process has an activation eners/ of
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Unformatted text preview: 92 kJ/mol. If the enthalpy change for a) g2kJlmol b) 62kJlmol pS+kJ/mol d) 3OkJ/mol 21-22.Thefoll9$dngffi\beenproposedasthemechanismfortheoverallreaction: wNde)+2H:o(e) A! step l: No+No* Nro, +i+r'r.- . ."? step 2: N2O2 + H2,-+ N2O + H2O j,o\rr step 3: N2O + Hz -+ Nz + HzO 21. (4 pts.) which step in the mechanism is likely to be the rate determining? ^--\ a) step I 7p.4reV2 c) step3 i-.i pf) I y---LL 4.2 + 6't \ Ll :Y \j/ \ I-v 22. (6 pts) What is the rate law for the overall reaction? (.Nzo "' a) mte:klNO]tftfrlt b) rate-k[NzOz]lHz] c) raIFk[NzO][Hz] d) rate={NO12 C>t*k[No]2Fr,l Fq4e * Duti: )zot t ; F*k =V-{pA.'3} nY= |dtr-ir.: { i &ro-...
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