Advertencia estricta: Sin IA$.$ Cree una tabla impecable.

AW$01$

"Consider the production of the stable product species HBr $($hydrogen bromide$)$ from the initial reactants H$2$ and Br$2.$ The global reaction that describes this can be written as H$2+$ Br$22$HBr$.$ At the molecular level, the following set of five elementary reactions applies:

R$1$: M $+$ Br$2$ Br $+$ Br $+$ M

R$2$: Br $+$ H$2$ HBr $+$ H

R$3$: H $+$ Br$2$ HBr $+$ Br

Note that R$1$ and R$2$ are reversible, while R$3$ is irreversible.

a$.$ Categorize each of the forward and reverse $($where applicable$)$ reactions based on the number of molecules that must collide for the reaction to occur $($e$.$g$.,$ bimolecular, $...).$

b$.$ Categorize each of the forward and reverse $($where applicable$)$ reactions based on its role in the chain reaction mechanism $($e$.$g$.,$ chain initiation, $...).$

c$.$ Write expressions for the time$-$rates$-$of$-$change of molar concentrations of each of the species involved in the reaction set, in terms of the molar concentrations of the species involved and the rate coefficients for the reactions.

d$.$ Assuming that a steady$-$state approximation is appropriate for H and for Br$,$ write expressions for the steady$-$state molar concentrations of H and of Br$.$ Your results should be in terms of $($at most$)$ the molar concentrations of H$2,$ Br$2,$ and HBr and the reaction rate coefficients."