22. Cyclopropane isomerizes exothermically to propene as shown. Н. Н. H AH = -32 kJ mol-1 H-Ć H. с 1 H C-H H H 1 H 1 H p

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22. Cyclopropane isomerizes exothermically to propene as shown. Н. Н. H AH = -32 kJ mol-1 H-Ć H. с 1 H C-H H H 1 H 1 H propene cyclopropane The C-C single bond in propene has an estimated bond dissociation enthalpy (BDE) of 345 kJ mol-1, while the C=C double bond in propene has a BDE of 611 kJ mol-1. Assuming that the C-H bonds in propene and cyclopropane all have the same BDE, what is the estimated BDE of a C-C single bond in cyclopropane? (A) 308 kJ mol-1 (B) 329 kJ mol-1 (C) 423 kJ mol-1 (D) 924 kJ mol-1 a 23. Two reactions have similar AH°rxn values (AH°rxn (1) AH°rxn (2)), but reaction (1) has a much smaller standard entropy change than reaction (2) (AS°rxn (1) << AS°rxn (2)). At 298 K, which statements about these two reactions must be correct? I. Reaction (1) must have a larger equilibrium constant (Keq (1) > Keq (2)). II. Reaction (1) must have a larger Arrhenius prefactor (A(1) > A(2)). (A) I only (B) II only (C) Both I and II (D) Neither I nor II