Answer the following questions about the reaction coordinate shown below. Is the
ID: 486901 • Letter: A
Question
Answer the following questions about the reaction coordinate shown below. Is the overall reaction exothermic or endothermic? _________ How many mechanistic steps are in the reaction? _________ Which points, A, B, C, D, E, F, or G on the reaction surface are transition states? _________ Place the appropriate label, Delta G degree, k, E_a, or Delta S degree, in each of the 3 boxes shown on the reaction coordinate diagram. True or False The Hammond Postulate states that the transition states for exothermic reactions look more like the starting material than product. ______ Temperature increases reaction rates but has no influence on equilibrium constants. ________ Increasing concentrations of starting materials always increase reaction rates. ______ A positive entropy, Delta S degree, leads to an increase in the Free Energy of the reaction. ______ A fast reaction has a large negative Delta G degree of reaction. ______ The larger the energy of activation the larger the rate of the reaction. _______Explanation / Answer
Q9
a.
since Final energy of products (G) is higher than (A) reactants, then this must be absorbing energy, i.e. ENDOTHERMIC
b.
this seems to have at least 3 steps
B,D,F
c)
transition state
transition states are all those "loop" on th etop, so B,D,F are transitions stages
d)
dG --> between G and A (right box)
a is that between C and E
finally, B to A --> Ea