Question

The decomposition of N, O, can be described by the equation /(s) [N,931(M) 1.871 0 2N, O (soln) — 4 NO, (soln) + O2(g) 165 1.687 446 1.413 Consider the data in the table for the reaction at 45 'C in carbon tetrachloride solution. 765 1.156

Answer 1

Ans :-

(a). Because,

Average rate of reaction = -Change in concentration of reactants (Δ[C]) / Change in time (Δt)

Where, -ve sign indicates the decrease in concentration of N₂O₅ with time.

So,

Average rate of reaction from 0 to 165 s = -[C_final - C_initial] / [T_final - T_initial]

= -[1.687 - 1.871] M / (165-0)s

= 1.12 x 10^-3 M/s

Therefore, average rate of reaction = 1.12 x 10-3 M/s

(b).

Average rate of reaction from 165 to 446 s = -[C_final - C_initial] / [T_final - T_initial]

= -[1.413 - 1.687] M / (446-165)s

= 9.75 x 10^-4 M/s

Therefore, average rate of reaction = 9.75 x 10-4 M/s

(c).

Average rate of reaction from 446 to 765 s = -[C_final - C_initial] / [T_final - T_initial]

= -[1.156 - 1.413] M / (765-446)s

= 8.06 x 10^-4 M/s

Therefore, average rate of reaction = 8.06 x 10-4 M/s