Question

In a study of the decomposition of ammonia on a platinum surface at 856 °C
NH_3--------->1/2 N₂ + 3/2 H₂
the following data were obtained:

[NH3], M	1.26×10-2	6.30×10-3	3.15×10-3	1.58×10-3
seconds	0	1000	1.50×103	1.75×103

Hint: It is not necessary to graph these data.
(1)
The observed half life for this reaction when the starting concentration is 1.26×10^-2 M is s and when the starting concentration is 6.30×10^-3 M is s.
(2)
The average rate of disappearance of NH₃ from t = 0 s to t = 1000 s is  M s^-1.
(3)
The average rate of disappearance of NH₃ from t = 1000 s to t = 1.50×10³ s is  M s^-1.
(4)
Based on these data, the rate constant for this _______zerofirstsecond order reaction is M s^-1.

Answer 1