Constants I Periodic TablePart AFor the following reaction studied in the gas phase (Fridgen, T. D., et al. J.Phys. Chem. A 2005, 109, 7519):Ci-+ C3H7CN → C1C3H7+ CN-Is the overall reaction exothermic or endothermic?Match the words in the left column to the appropriate blanks in the sentence on the right.the following potential energy surface was derived:[Cl–C;H;-CN]¯Reset HelpClC;H,+ CNexothermicThe overall reaction isbecauseat a higher energyendothermicthanthe products arethe reactants areCl +C;H¬CNthe transition state is[CIC;H,-CN]SubmitRequest Answer[Cl–C;H;CN]Reaction progressPart BThe mechanism for the reaction, based on the potential energy diagram,There are six activation energies, one associated with each of the rate constants in the mechanism. Two of the elementary steps are barrierless, in that they have activationcan be written as:energies equalling zero. Which of the six activation energies, Eal, Ea–1 Ea2 Ea-2 Ea3 Ea-3 are equal to zero?kCi¯+ C3H7 [Cl – C3H7CN]-Check all that apply.k[CIC3H7 – CN]Eal[Cl – C3H7CN]k,Ea-1[CIC3H7 – CN]CIC3H7+ CNEa2Еa-2Ea3Ea-3Energy

A) The overall reaction is endothermic because the products are at a higher energy than the reactant…

Constants I Periodic Table • Part A For the following reaction studied in the gas phase (Fridgen, T. D., et al. J. Phys. Chem. A 2005, 109, 7519): CI+ C3H7CN - CIC3H7 + CN Is the overall reaction exothermic or endothermic? ¯ Match the words in the left column to the appropriate blanks in the sentence on the right. the following potential energy surface was derived: [CI-C,H,-CN] Reset Help CICH,+ CN exothermic The overall reaction is because at a higher energy endothermic than the products are the reactants are CI +C;H;CN the transition state is [CIC;H,-CN] Submit Request Answer CI-C,H,CN] - Reaction progress- • Part B The mechanism for the reaction, based on the potential energy diagram, There are six activation energies, one associated with each of the rate constants in the mechanism. Two of the elementary steps are barrierless, in that they have activation energies equalling zero. Which of the six activation energies, Eal, Ea-1 Ea2 Ea-2 Ea3 Ea-3 are equal to zero? can be written as: CI+ C3H7 (CI – C3H7CN] Check all that apply. O Eal (C1 - C3H7CN] (CIC3H7 - CN]- Ea-1 [CIC3H7 - CN] CIC3H7 + CN Ea2 Ea-2 O Ea3 Ea-3

Constants I Periodic Table • Part A For the following reaction studied in the gas phase (Fridgen, T. D., et al. J. Phys. Chem. A 2005, 109, 7519): CI+ C3H7CN - CIC3H7 + CN Is the overall reaction exothermic or endothermic? ¯ Match the words in the left column to the appropriate blanks in the sentence on the right. the following potential energy surface was derived: [CI-C,H,-CN] Reset Help CICH,+ CN exothermic The overall reaction is because at a higher energy endothermic than the products are the reactants are CI +C;H;CN the transition state is [CIC;H,-CN] Submit Request Answer CI-C,H,CN] - Reaction progress- • Part B The mechanism for the reaction, based on the potential energy diagram, There are six activation energies, one associated with each of the rate constants in the mechanism. Two of the elementary steps are barrierless, in that they have activation energies equalling zero. Which of the six activation energies, Eal, Ea-1 Ea2 Ea-2 Ea3 Ea-3 are equal to zero? can be written as: CI+ C3H7 (CI – C3H7CN] Check all that apply. O Eal (C1 - C3H7CN] (CIC3H7 - CN]- Ea-1 [CIC3H7 - CN] CIC3H7 + CN Ea2 Ea-2 O Ea3 Ea-3

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.43PAE

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