In a study of the decomposition of ammonia on a platinum surface at 856 °C NH31/2 N2 + 3/2 H, the following data were obtained: NH3), M seconds 3.90x10-3 1000 1.95×10-3 1.50x103 9.75x10-4 1.75x103 7.80×10-3 Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 7.80×103 M i ( Mis [ Js and when the starting concentration is 3.90×10-3 (2) The average rate of disappearance of NH3 from t =0 s to t = 1000 s is| ]Ms'. (3) The average rate of disappearance of NH3 from t=1000 s to t = 1.50×10³ s is ]Ms!. (4) Based on these data, the rate constant for this [ ) order reaction is | Ms!.

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Chapter1: Chemical Foundations
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In a study of the decomposition of ammonia on a platinum surface at 856 °C
NH3-1/2 N2 + 3/2 H,
the following data were obtained:
NH3), M
3.90x10-3
1000
1.95x10-3
1.50x103
9.75x10-4
1.75x103
7.80x10-3
seconds
Hint: It is not necessary to graph these data.
(1)
The observed half life for this reaction when the starting concentration is 7.80×10-3 M is|
s and when the starting concentration is 3.90x103
M is
(2)
The average rate of disappearance of NH3 from t= 0 s to t= 1000 s is
Ms!.
(3)
The average rate of disappearance of NH3 from t = 1000 s to t= 1.50×103 s is
]Ms!.
(4)
Based on these data, the rate constant for this
Ms!.
order reaction is
Transcribed Image Text:In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3-1/2 N2 + 3/2 H, the following data were obtained: NH3), M 3.90x10-3 1000 1.95x10-3 1.50x103 9.75x10-4 1.75x103 7.80x10-3 seconds Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 7.80×10-3 M is| s and when the starting concentration is 3.90x103 M is (2) The average rate of disappearance of NH3 from t= 0 s to t= 1000 s is Ms!. (3) The average rate of disappearance of NH3 from t = 1000 s to t= 1.50×103 s is ]Ms!. (4) Based on these data, the rate constant for this Ms!. order reaction is
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