Dinitrogen pentoxide decomposes in the gas phase according to the elementary process
N₂O₅(g) → 2 NO₂(g) + 1⁄2 O₂(g)
When the experiment is performed at 308 K, the reaction is first order in N₂O₅. Initial-rate data are provided.
Trial
[N₂O₅]₀ (M)
Initial rate (mol·L⁻¹·s⁻¹)
1
0.050
1.2 × 10⁻⁴
2
0.100
2.5 × 10⁻⁴
(a) Write the complete rate law for the decomposition reaction, including the rate constant.
(b) Calculate the value of k for each trial. Show your work and include correct units.
(c) Average the two trial values to obtain a single reported k. State the final value with appropriate significant figures and units.