Chemical Kinetics
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a month agoNew answer posted
a month agoContributor-Level 6
Reaction rate is used to measure how fast or slow reactions occur per unit time. The rate constant is a proportionality factor that remains constant for every reaction.
New answer posted
a month agoContributor-Level 6
Yes, in elementary reactions, order and molecularity can be the same, but this is not always the case because order is an experimental quantity, and molecularity is a theoretical concept.
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a month agoContributor-Level 6
Reaction Kinetics, also known as chemical kinetics, is the study of the rate of chemical reaction and the factors affecting the reaction rate, such as temperature, concentration, and catalyst.
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a month agoContributor-Level 10
A → 2B
t = 0: 1 mole 0
after 100 min: (1 - 0.1) mol 0.2 mol
K = (1/t)ln [a/ (a-n)]
K = (2.303/100)log (1/0.9) min? ¹
0.693/t? /? = (2.303/100) [log10 - log9] = (2.303/100) x 0.046
t? /? = 69.3 / (2.303 x 0.046) = 654.15 min
Ans. = 654 (the nearest integer)
New answer posted
a month agoContributor-Level 10
A reaction can have zero activation energy, for example, •CH? + •CH? → CH? − CH? has zero activation energy.
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a month agoContributor-Level 10
Let the new rate be, R'.
A' = [3 A], B' = [B]
R' = K [A']² [ B']
= K [3 A]² [ B]
= 9 K [ A]² [ B]
= 9 * R
Hence, rate would become nine times.
New answer posted
a month agoContributor-Level 10
k = Ae? Ea/RT
ln (K? /K? ) = (Ea/R) [1/T? - 1/T? ]
ln (5) = (Ea/8.314) [1/300 - 1/315]
1.6094 = (Ea/8.314) [15 / (300 * 315)]
Ea = 84297 J
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