Question

How to conclude that a reaction is first order from concentration

Answer 1

Answer:

The rate law for a chemical reaction is an equation that relates the reaction rate with the concentrations or partial pressures of the reactants. For the general reaction

aA

+

bB

→

C

with no intermediate steps in its reaction mechanism, meaning that it is an elementary reaction, the rate law is given by:The rate law for a chemical reaction relates the reaction rate with the concentrations or partial pressures of the reactants.

Answer 2

First-Order Reactions
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 ] .

r=−d[A]dt=k[A]

2N2O5(g)→4NO2(g)+O2(g)

Rate=k[N2O5]m.

rate=k[N2O5]1=k[N2O5]

1.4×10−3=k(0.020)

k=0.070s−1.

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