genow.com/ilrntakeAssignment/takeCovalentActivity.do?locator assignment-take&tak

Question

genow.com/ilrntakeAssignment/takeCovalentActivity.do?locator assignment-take&takeAssignmentsessionLocator; assignment-take This question has multiple parts. References] Work all the parts to get the most points. One mechanism for the destruction of ozone in the upper atmosphere is (g) +NO(g) NO2 (g) O2 (g) Slow NO2 (g) O(g) NO(g) O2 (g) Fast overall reaction os(g) o(g) 202(g) a Which species is a catalyst? NO NO2 b Which species is an intermediate? NO NO C Ea for the uncatalyzed reaction Oa (g) O(g)

Explanation / Answer

NO is the catalyst

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NO2 is an intermediate

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For uncatalysed reaction k = Aexp(-Ea/RT)

k(cat) /k(uncat) = Aexp(-Ea(cat)/RT)/Aexp(-Ea(uncat)/RT)

                       = exp [Ea(uncat)-Ea(cat))/RT]

                       = exp [(14-11.9)*10^3 J/mol/ 8.314J/K/mol *340K] = 2.10

The ratio is 2.10 or 2:1

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