Transition State Theory

Question 1

Forward rate constant

Answer 1

Probability that an A molecule will be converted to a B molecule per unit time

Question 2

High activation energy means

Answer 2

Rate depends strongly on temp

Question 3

Dimensions of potential energy landscape

Answer 3

3N-6 dimensions for a non-linear molecule

Question 4

Minima on potential energy surface

Answer 4

Stable species

Question 5

1st order saddle points

Answer 5

Transition structures, lowest energy point along 3N-7 coordinated and the highest energy point along one coordinate, the reaction coordinate

Question 6

Assumptions in transition state theory

Answer 6

Motion along reaction is treated classically therefore for light atoms which tunnel our calculated value is > kf
All molecules passing through TS region become products, may not always be true, leads to calculated value < kf
Reaction path uncoupled from all other vibrations