In a study of the decomposition of ammonia on a platinum surface at 856 °C NH3-1/2 N₂ + 3/2 H₂ the following data were obtained: [NH3], M seconds 5.79x10-3 0 2.90x10-3 998 1.45x10-3 7.25x10-4 1.50x10³ 1.75x10³ Hint: It is not necessary to graph these data. (1) The observed half life for this reaction when the starting concentration is 5.79x10-3 M is starting concentration is 2.90x10-³ M is (2) The average rate of disappearance of NH3 from t = 0 s to t = 998 s is (3) The average rate of disappearance of NH3 from t = 998 s to t = 1.50x10³ s is (4) Based on these data, the rate constant for this order reaction is M s 1. M s 1. Ms¹. s and when the
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
![In a study of the decomposition of ammonia on a platinum surface at 856 °C
NH3-1/2 N₂ + 3/2 H₂
the following data were obtained:
[NH3], M
seconds
5.79x10-3
0
2.90x10-3
998
1.45x10-3
1.50x10³
Hint: It is not necessary to graph these data.
(1)
The observed half life for this reaction when the starting concentration is 5.79x10-3 M is
starting concentration is 2.90x10-³ M is
7.25x10-4
1.75x10³
S.
(4)
Based on these data, the rate constant for this
(2)
The average rate of disappearance of NH3 from t = 0 s to t = 998 s is
(3)
The average rate of disappearance of NH3 from t = 998 s to t = 1.50x10³ s is
order reaction is
M s ¹.
M s ¹.
Ms¹.
s and when the](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb8d8ce1c-d1ae-4fbf-bbe3-121c6915374e%2Fa5dfe32a-7c74-4b8d-bd09-75f89ab8d422%2Fblcbsoh_processed.jpeg&w=3840&q=75)
|
time |
[NH3] |
|
0 |
5.79 × 10–3 |
|
998 |
2.90 × 10–3 |
|
1.50 ×103 |
1.45 × 10–3 |
|
1.75 ×103 |
7.25 ×10–4 |
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