In a certain reaction 8% of the reactant decomposes in 30 minutes, 24% in 90 minutes and 48% in 180 minutes. What are the dimensions of the rate constant?

Question

TestHub · Accepted Answer

30 min → 8%

90 min → 24%

180 min → 48%

Notice:

Time ×3 → Decomposition ×3

Time ×6 → Decomposition ×6

Decomposition $\propto$ Time

So the reaction is Zero Order.

For Zero Order Reaction:

Rate = $k$

$k = \frac{co n ce n t r a t i o n}{t im e}$

Units:

mol L⁻¹ sec⁻¹

Chemistry - Chemical Kinetics Question with Solution | TestHub

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