Question

Identify the reaction order from each of the following rate constant i) k = 2.3×10^-5 L /mol s ii) k= 3× 10^ _4 s^-1

Answer 1

the unit of the rate constant provides you with the answer

1) idk

2) first order

Answer 2

(i) Reaction order is 2

(ii) Reaction order is 1

Explanation:

Order of the reaction is defined as the sum of the exponents or powers to which the molar concentration in the rate law equation are raised to express the observed rate of the reaction.

For a general reaction:

$A+B\rightarrow C+D$

$rate=k[A]^a[B]b$

a = order with respect to A

b= order with respect to B

n= a + b = total order

$molL^{-1}s^{-1}=k[molL^{-1}]^n$

Units of rate constant =$(molL^{-1})^{1-n}s^{-1}$

For 1) $2.3\times 10^{-5} L /mols$ for n= 2

ii) $3\times 10^{-4}s^{-1}$ for n= 1

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