# Which is faster first order or second-order reaction?

## Which is faster first order or second-order reaction?

For two or more reactions of the same order, the reaction with the largest rate constant is the fastest. Because the units of the rate constants for zeroth-, first-, and second-order reactions are different, however, we cannot compare the magnitudes of rate constants for reactions that have different orders.

What is the difference between 1st and zero order rate reactions?

The main difference between first order and zero order kinetics is that the rate of first order kinetics depends on the concentration of one reactant whereas the rate of zero order kinetics does not depend on the concentration of reactants.

What is first second and pseudo order of kinetics?

University of the Witwatersrand. In addition to what has been said, all it means is that, for Pseudo first order, only one reactant is a determining step in the rate of a reaction. In second order, both reactants participate in a reaction. For example, in the reaction o x + y = z, Rate = k[x][y]

### What is an example of a second-order reaction?

Reactions in which reactants are identical and form a product can also be second order reactions. Many reactions such as decomposition of nitrogen dioxide, alkaline hydrolysis of ethyl acetate, decomposition of hydrogen iodide, formation of double stranded DNA from two strands etc.

What is the first order and second-order?

A first-order reaction rate depends on the concentration of one of the reactants. A second-order reaction rate is proportional to the square of the concentration of a reactant or the product of the concentration of two reactants.

What is the difference between zero order removal and first order removal?

In brief : First order elimination kinetics: a constant proportion (eg. a percentage) of drug is eliminated per unit time. First order kinetics is a concentration-dependent process (i.e. the higher the concentration, the faster the clearance), whereas zero order elimination rate is independent of concentration.

## What is an example of a second order reaction?

Which is the example for second-order level?

For example, you can think of this as I’m hungry so let’s eat a chocolate bar. Second-order thinking is more deliberate. It is thinking in terms of interactions and time, understanding that despite our intentions our interventions often cause harm.

What is 2nd 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 a 2nd order reaction?

: a chemical reaction in which the rate of reaction is proportional to the concentration of each of two reacting molecules — compare order of a reaction.

What does second-order mean in physics?

Second-order in time means two derivatives with respect to time. The classic example is the basic one-dimensional wave equation: ∂2ϕ∂t2=∂2ϕ∂x2 . This equation does have time-reversal symmetry, because if you replace t with −t, you get the exact same equation back.

Example of a second-order reaction: NO 2 + CO → NO + CO 2; Difference Between Molecularity and Order of Reaction. The molecularity of a reaction refers to the number of atoms, molecules, or ions which must undergo a collision with each other in a short time interval for the chemical reaction to proceed.

What do we mean by second order kinetics?

On the other hand, the second order is a reaction for which the sum of exponents in a correctly determined kinetic equation in the form of a power monomial is equal to 2.

## What is the unit of rate constant in second order reaction?

For a zero order reaction, the rate constant has units molar per second (M/s) or mole per liter per second (mol·L−1·s−1) For a first order reaction, the rate constant has units of per second of s-1. For a second order reaction, the rate constant has units of liter per mole per second (L·mol−1·s−1) or (M−1·s−1)

What is second order chemical reaction?

A second order reaction is a type of chemical reaction that depends on the concentrations of one-second order reactant or two first-order reactants. This reaction proceeds at a rate proportional to the square of the concentration of one reactant or the product of the concentrations of two reactants. 