Answer to Question #312020 in General Chemistry for London

Question

What is the rate of reaction when [N2O5]=0.0250[N2O5]=0.0250 ?

Express the rate in molarity per second to three significant figures.

Answer 1

[N₂O₅] = 0.0250 M;

For the complete definition of rate of reaction one must know the course of the reaction and the reaction rate constant (K).

If the reaction is the zero order reaction then: v = K(M/s) * [N₂O₅]⁰ = K * 1 = K (M/s);

If the reaction is the first order reaction then: v = K(1/s) * [N₂O₅]¹ = K * [N₂O₅] = K * 0.025 (M/s);

If the reaction is the second order reaction then: v = K(1/(M*s)) * [N₂O₅]² = K * [N₂O₅] * [N₂O₅] = K * 0.025 * 0.025 = K * 0.001 (M/s).