Which order of reaction obeys the expression t1/2 = 1/ka?
- zero
- first
- second
- third
Explanation
Since the reaction order is second, the formula for t1/2=k−1[A]−10.
This means that the half-life of the reaction is 0.0259 seconds
while
For a first-order reaction, t1/2 is independent of the initial concentration of reactants.
***
The rate constant of a zero-order reaction is equal to the rate of reaction.
R: t1/2 for zero order reaction is directly proportional to the initial concentration
***
A third-order reaction is a reaction in which the rate is directly proportional to the concentration of three reacting molecules.
ND10-9-2023
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