Nitrogen pentoxide decomposes according to equation:2N2O5 (g) → 4NO2 (g) + O2 (g)This first order reaction was allowed to proceed at 40 °C and the data below were collected:(a) Calculate the rate c...

Question

Nitrogen pentoxide decomposes according to equation:
2N₂O₅ (g) → 4NO₂ (g) + O₂ (g)

This first order reaction was allowed to proceed at 40 °C and the data below were collected:

(a) Calculate the rate constant. Include units with your answer.

(b) What will be the concentration of N₂O₅ after 100 minutes?

(c) Calculate the initial rate of reaction.

Philoid · Accepted Answer

(a) As the reaction is first order, so the rate equation can be written as:

t=20 minutes, [A]₀= 0.400 M, [A]= 0.289 M

So,

0.14114

min^-1

(b) Now we have t=100 min, [A]₀= 0.400 M and k=0.0163 min^-1

So,

0.0163

[A] = 0.078 M

(c) Initial Rate, R = k[N₂O₅]

= 0.0163 0.400

= 0.00652 M min^-1