For the reaction A + 2B ? C,the rate law is $\frac{\Delta[\mathrm{C}]}{\Delta t}=k[\mathrm{~A}]^{2} \times[\mathrm{B}]$ . What are the units of the rate constant where time is measured in seconds?

Question

Quizplus · Accepted Answer

The overall order of the reaction is 3 (2 from A and 1 from B), so the units of k are $\frac{1}{(\mathrm{mol/L})^{3-1} \cdot s} = \frac{1}{(\mathrm{mol/L})^{2} \cdot s}$.

For the Reaction a + 2B ? C,the Rate Law Δ[C]Δt=k[ A]2×[B]\frac{\Delta[\mathrm{C}]}{\Delta t}=k[\mathrm{~A}]^{2} \times[\mathrm{B}]ΔtΔ[C]​=k[ A]2×[B]

For the Reaction a + 2B ? C,the Rate Law $\frac{\Delta[\mathrm{C}]}{\Delta t}=k[\mathrm{~A}]^{2} \times[\mathrm{B}]$