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What are the differences between order and molecularity of a reaction?
Wiki User
∙ 11y ago
ORDER OF A REACTION
MOLECULARITY OF A REACTION
It is sum of the concentration terms on which the rate of reaction actually depends or it is the sum of the exponents of the concentrations in the rate law equation.
It is the number of atoms, ions or molecules that must collide with one another simultaneously so as to result into a chemical reaction.
It need not be a whole number i.e. it can be fractional as well as zero.
It is always a whole number.
It can be determined experimentally only and cannot be calculated.
It can be calculated by simply adding the molecules of the slowest step.
It is for the overall reaction and no separate steps are written to obtain it.
The overall molecularity of a complex reaction has no significance. It is only slowest step whose molecularity has significance for the overall reaction.
Even the order of a simple reaction may not be equal to the number of molecules of the reactants as seen from the unbalance equation.
For simple reactions, the molecularity can usually be obtained from the Stoichiometry of the equation.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agomolecularity is the sum of stoichiometric coefficients while order of reaction can be obtained practically
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What is the relationship between concentration and reaction rate?
In general (but not always), the reaction rate will increase with increasing concentrations. If the reaction is zero order with respect to that substance, then the rate will not change.
What is the reaction order of the decomposition of nitrogen pentoxide?
it is first order reaction...
What is the unit of first order reaction?
A zero-order reaction is a reaction that proceeds at a rate that is independent of reactant concentration. Typically with increasing or decreasing reactants
What is The order of reaction for which unit of rate and rate constant is same?
In a zero order overall process, the rate and rate constant will be the same. (Reaction order is an exponent, and if that exponent is "0" then the value is "1" and will cancel out.)
Reaction require energy in order to take place is?
inhibitor
How is the molecularity of the rate-controlling step related to the overall reaction order?
the molecularity must be equal to the overall reaction order.
Why order is zero while molecularity is not zero?
Molecularity can only have integer values(1,2,3...).So,its value canot be zero.It can be calculated by simply adding the molecules involved in a chemical reaction.
Whether order and molecularity be equal in any case?
for every elementary reactions, order and molecularity are equal
Define Pseudo unimolecular reaction with example?
there is no meaning in pseudo unimolecular reaction. Explanation: molecularity of a reaction is "the no. of species(ions, molecules or atoms) which collide simultaneously to give rise a chemical change or chemical reaction. a reaction can be called unimolecular (decomposition of ammonium nitrite to nitrogen and water) as single molecule decomposes to give rise to products a reaction can be called bimolecular (HI decomposes to H2 and I2) as two HI molecules are colliding. that means molecularity says about "actually how many species collide and there is nothing ambiguity (pseudo) in it. but a reaction can be called pseudo first order reaction (hydrolysis of sucrose) as rate of reaction depends on only sucrose conc. and water solvent conc. as is in excess do not affect the rate. if any one is having doubts in chemistry u can mail me at chemistry_krish@yahoomail.com
How is order of reaction determined graphically?
in our syllabus there is only the first and the zero order reaction in which if the graph is plotted between the concentration and time then it is a zero order reaction while if the graph is between the log of concentration and time then the reaction is of the first order.hope this will help u.
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In order to find out what the major companies are and what the differences between said companies are, you are going to have to talk to a representative from each company and ask questions in order to do a comparison.
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Why third order reaction usually not is not possible?
Third order reactions imply reaction between three molecules, which implies collision between three molecules. From a probability standpoint this is much less likely than, say, a second-order reaction, where only two molecules must come together.
Differences between preposition to and preposition for?
TO and FOR express the order. TO goes before a verb, and FOR before a noun.
What is the relationship between concentration and reaction rate?
In general (but not always), the reaction rate will increase with increasing concentrations. If the reaction is zero order with respect to that substance, then the rate will not change.
What is the reaction order of the decomposition of nitrogen pentoxide?
it is first order reaction...
