(a) Consider the following (overall) chemical reaction k A B The experimentally determined rate law expression reads: rate = k[A]. At 30 °C, the value of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. The reaction should proceed until only 2% of the initial amount of A is present in the reaction mixture. (i) How long will this take at 30°C? (ii) What value would the rate coefficient k have to be, in order for the concentration of A to reach the 2% level in 1 hour? (iii) At what temperature will k reach the value you calculated in (ii) assuming that the activation energy is 40 kJ mol¹?
(a) Consider the following (overall) chemical reaction k A B The experimentally determined rate law expression reads: rate = k[A]. At 30 °C, the value of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. The reaction should proceed until only 2% of the initial amount of A is present in the reaction mixture. (i) How long will this take at 30°C? (ii) What value would the rate coefficient k have to be, in order for the concentration of A to reach the 2% level in 1 hour? (iii) At what temperature will k reach the value you calculated in (ii) assuming that the activation energy is 40 kJ mol¹?
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter16: Reaction Rates
Section: Chapter Questions
Problem 69A
Related questions
Question
![(a) Consider the following (overall) chemical reaction
k
A
B
The experimentally determined rate law expression reads: rate = k[A]. At 30 °C, the
value of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. The
reaction should proceed until only 2% of the initial amount of A is present in the
reaction mixture.
(i) How long will this take at 30°C?
(ii) What value would the rate coefficient k have to be, in order for the
concentration of A to reach the 2% level in 1 hour?
(iii) At what temperature will k reach the value you calculated in (ii) assuming
that the activation energy is 40 kJ mol¹?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2617a9f9-3ea5-4cff-9530-7535cc6b8a19%2F2b009867-d5a3-48b7-9211-7849d9d30697%2Fttyhr26_processed.png&w=3840&q=75)
Transcribed Image Text:(a) Consider the following (overall) chemical reaction
k
A
B
The experimentally determined rate law expression reads: rate = k[A]. At 30 °C, the
value of k is 3 x 10-4 s¹. Let the initial concentration of A be [A]0 = 0.75 mol L-¹. The
reaction should proceed until only 2% of the initial amount of A is present in the
reaction mixture.
(i) How long will this take at 30°C?
(ii) What value would the rate coefficient k have to be, in order for the
concentration of A to reach the 2% level in 1 hour?
(iii) At what temperature will k reach the value you calculated in (ii) assuming
that the activation energy is 40 kJ mol¹?
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