Does the rate constant depend on the order of the reaction?
Table of Contents
- 1 Does the rate constant depend on the order of the reaction?
- 2 For what order is the reaction unit rate and rate constant the same?
- 3 What is order of reaction explain different types of order of reaction?
- 4 What is the rate constant for second order reaction?
- 5 On which of the following factors the rate constant does not depend?
- 6 Can order of reaction be greater than 3?
Does the rate constant depend on the order of the reaction?
The Order of Reaction refers to the power dependence of the rate on the concentration of each reactant. Thus, for a first-order reaction, the rate is dependent on the concentration of a single species. The order of reaction is an experimentally determined parameter and can take on a fractional value.
Should the rate constant be the same?
You should verify that using data from any other row of Table 14.3. 1 gives the same rate constant. This must be true as long as the experimental conditions, such as temperature and solvent, are the same. Determine the rate law for the reaction and calculate the rate constant.
For what order is the reaction unit rate and rate constant the same?
zero-order reaction
Therefore, in the zero-order reaction, the rate is independent of the concentration of reactants and hence, the units of rate and rate constant becomes equal which is mol/L/time.
Can reaction orders be the same?
Although in this example the stoichiometric coefficient is the same as the reaction order, this is not always the case. The reaction order must always be determined experimentally….Second-Order Reactions.
| Experiment | [NO2]0 (M) | Initial Rate (M/s) |
|---|---|---|
| 2 | 0.010 | 5.40 × 10−5 |
| 3 | 0.0080 | 3.46 × 10−5 |
| 4 | 0.0050 | 1.35 × 10−5 |
What is order of reaction explain different types of order of reaction?
The order of a chemical reaction with respect to each reactant is defined as the exponent to which the concentration term of that reactant, in the rate law, is raised. The overall order of the reaction is defined as the sum of the exponents to which the concentration terms in the rate law are raised.
Which unit of reaction rate constant is correct for a first order reaction?
1/s
The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s). Created by Yuki Jung.
What is the rate constant for second order reaction?
Second order reactions can be defined as chemical reactions wherein the sum of the exponents in the corresponding rate law of the chemical reaction is equal to two. The rate of such a reaction can be written either as r = k[A]2, or as r = k[A][B].
What is the rate constant of first order reaction?
k is the first-order rate constant, which has units of 1/s. The method of determining the order of a reaction is known as the method of initial rates. The overall order of a reaction is the sum of all the exponents of the concentration terms in the rate equation.
On which of the following factors the rate constant does not depend?
concentration of reactants and products.
How can the rate constant be determined from the rate law?
A rate law shows how the rate of a chemical reaction depends on reactant concentration. For a reaction such as aA → products, the rate law generally has the form rate = k[A]ⁿ, where k is a proportionality constant called the rate constant and n is the order of the reaction with respect to A.
Can order of reaction be greater than 3?
– Means if the reactants are 3 or more than three in a chemical reaction then the chances of collision between all these molecules to form the product are very less. – Therefore higher order (>3) reactions are rare due to Low probability of simultaneous collision of all the reacting species.