Question

Calculation of rate constant for first order reaction

Answer 1

Answer:

Where, Kc is the rate constant of the degradation process,

initial concentration= C0

Concentration after exposing to UV at time t = Ct

A plot should be drawn with ln(C0/Ct) vs. time t.

The slope of the linear fit gives the rate constant, Kc.

If R^2 from the linear fit is greater than 95 then it follows the pseudo-first order kinetics.

Answer 2

Answer:

First-Order Reactions

1. A first-order reaction depends on the concentration of one reactant, and the rate law is: r=−dAdt=k[A] r = − dA dt = k [ A ] .

2. r=−d[A]dt=k[A]

3. 2N2O5(g)→4NO2(g)+O2(g)

4. Rate=k[N2O5]m.

5. rate=k[N2O5]1=k[N2O5]

6. 1.4×10−3=k(0.020)

7. k=0.070s−1.

Explanation:

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