In some reactions, two or more different products can be formed. If the product formed by the fastest reaction predominates, the reaction is considered to be under “kinetic control.” If the predominant product is the most thermodynamically stable, the reaction is considered to be under “thermodynamic control.” In the reaction of HBr with the reactive intermediate CH₃CHPCHCH₂⁺, at low temperatures the predominant product is CH₃CHBrCHPCH₂, but at high temperatures, the predominant product is CH₃CHPCHCH₂Br.

(a) Which product is formed by the reaction with the larger activation energy?

(b) Does kinetic control predominate at low or high temperatures? Explain your answers.