Consider the following initial rate data (at 273 K) for the decomposition of a substrate (substrate 1) which decomposes to product 1 and product 2: [Substrate 1] (M) Initial Rate (M/s) 0.4 0.183 0.8 0.183 2 0.183 Determine the half-life for the decomposition of substrate 1 when the initial concentration of the substrate is 2.77 M.
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Ответ:
15.1 seconds is the half life of the reaction when concentration of the substrate is 2.77 M.
Explanation:
A → B + C
The rate law of the reaction will be :
Initial rate of the reaction when concentration of the substrate was 0.4 M:
Initial rate of the reaction when concentration of the substrate was 0.8 M:
[1] ÷ [2] :
x = 0
The order of the reaction is zero.
For the value of rate constant ,k:
x = 0
k= 0.183 M/s
The half life of the zero order kinetics is given by :
Where:
k = Rate constant of the reaction
So, the half-life for the decomposition of substrate 1 when the initial concentration of the substrate is 2.77 M:
15.1 seconds is the half life of the reaction when concentration of the substrate is 2.77 M.
Ответ:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.