Unit for rate constant for zeroth-order reaction


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Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Unit for rate constant for zeroth-order reaction

Postby Diviya Khullar 1G » Wed Mar 06, 2019 7:56 pm

What is the unit for the rate constant for a zeroth-order reaction?

405161024
Posts: 36
Joined: Fri Sep 28, 2018 12:25 am

Re: Unit for rate constant for zeroth-order reaction

Postby 405161024 » Wed Mar 06, 2019 8:03 pm

I think because the rate has to be mol.L^-1.s^-1 then the rate constant has to have the same units because it's not multiplied by anything

Saman Andalib 1H
Posts: 73
Joined: Fri Sep 28, 2018 12:16 am

Re: Unit for rate constant for zeroth-order reaction

Postby Saman Andalib 1H » Wed Mar 06, 2019 8:17 pm

The units for a 0th order reaction can simply be determined from setting the normal rate law units = to the rate constant times whatever reactant raised to whatever order the reaction is. For 0 order,

[mols*L^-1*s^-1]=k[A]initial^0 (0 order reaction).
This would simplify to
[mols*L^-1*s^-1]=k(1)

Therefore, the units of K in a 0 order reaction is [mols*L^-1*s^-1]


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