Question

Show that the rate of reaction is the same whether expressed in terms of the rate of consumption of any reactant or of the formation of any product.

2N₂O_5(g) → 4NO_2(g) + O_2(g)

The concentrations of reactants and products at different time intervals are given in the following table :

Concentrations of various species at different times for the reaction 2N₂O_5(g) → 4NO_2(g) + O_2(g) :

Time/s	[N2O5]/M	[NO2]/M	[O2]/M
0	0.0300	0	0
200	0.0213	0.0174	0.00435
400	0.0152	0.0296	0.00740
600	0.0108	0.0384	0.00960

Answer 1

The rate of the reaction can be expressed in terms of rate of consumption of reactants or rate of formation of products.

2N₂O_5(g) → 4NO_2(g) + O_2(g)

Consider concentrations at time t₁ = 200 seconds and t₂ = 400 seconds

The constant values of rate of reaction proves that the rate of the reaction may be measured in terms of concentration changes of reactants or products per unit time.