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In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is?
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In the following gaseous phase first order reaction A -> 2B+C Initial ...
Calculation of Rate Constant for First Order Reaction
The rate of a first order reaction is given by the rate law:
rate = k[A]
where A is the concentration of the reactant A, k is the rate constant, and the order of the reaction is 1.
Given Data
- Initial pressure (P₀) = 200 mmHg
- Final pressure (P) = 400 mmHg
- Time (t) = 20 minutes
Calculation of Concentration of A
Since the reaction is A -> 2B + C, the decrease in the pressure of A is directly proportional to the decrease in concentration of A. Therefore, the concentration of A at time t can be calculated as:
[A] = P₀ - P = 200 - 400 = -200 mmHg
Calculation of Rate Constant (k)
To calculate the rate constant k, we can use the integrated rate law for first-order reactions:
ln([A]₀/[A]) = kt
Substitute the values:
ln(200/-200) = k(20 minutes)
k = -0.693/20 = -0.03465 min⁻¹
Therefore, the rate constant for the given reaction is 0.03465 min⁻¹.
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In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is?
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In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is?.
In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the following gaseous phase first order reaction A -> 2B+C Initial pressure was observed to be 200 mmHg and after 20 minutes, it changed to 400mmHg. The rate constant for the reaction is?.
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