Equilibrium constant and elementary reaction rate constants


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ShravanPatel2B
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

Equilibrium constant and elementary reaction rate constants

Postby ShravanPatel2B » Tue Mar 10, 2020 8:55 pm

How is the equilibrium constant related to the forward and reverse rate constants of the
elementary reactions contributing to an overall reaction?

Jack Riley 4f
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Equilibrium constant and elementary reaction rate constants

Postby Jack Riley 4f » Tue Mar 10, 2020 9:35 pm

K=(k'/k) is the relationship between equilibrium constant and rate constants

Niharika 1H
Posts: 50
Joined: Thu Jul 25, 2019 12:16 am

Re: Equilibrium constant and elementary reaction rate constants

Postby Niharika 1H » Tue Mar 10, 2020 9:37 pm

The eq constant K = kf/kr.

WYacob_2C
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

Re: Equilibrium constant and elementary reaction rate constants

Postby WYacob_2C » Wed Mar 11, 2020 12:42 am

The equilibrium constant is equal to k(forward)/k(reverse). This is helpful when converting the concentration of intermediate species into concentrations of reactants of the overall reaction when given elementary reactions.

Sartaj Bal 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Re: Equilibrium constant and elementary reaction rate constants

Postby Sartaj Bal 1J » Wed Mar 11, 2020 10:22 am

For a forward reaction that is endothermic, increasing the equilibrium constant means that the forward rate constant will increase as well.

Kevin Xu 4F
Posts: 50
Joined: Fri Aug 09, 2019 12:16 am

Re: Equilibrium constant and elementary reaction rate constants

Postby Kevin Xu 4F » Wed Mar 11, 2020 10:59 am

In an equilibrium reaction, there is a forward reaction and a reverse reaction happening at the same time. The forward reaction's rate can be modeled as rate=k[reactants] and the reverse reaction's rate can be modeled as rate = k'[products]. At equilibrium, since the rates of forward and reverse reactions are equal, you can set these equal to each other and rearrange the rate constants on one side to get k/k' = [products]/[reactants]


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