What is half-life of a reaction derive the equation?
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What is half-life of a reaction derive the equation?
The half-life of a reaction is the time required for the reactant concentration to decrease to one-half its initial value. The half-life of a first-order reaction is a constant that is related to the rate constant for the reaction: t1/2 = 0.693/k.
What is the formula of 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].
Which of the following represents the equation for a second-order half-life?
Chemical Kinetics
| Question | Answer |
|---|---|
| Which of the following represents the equation for a second-order half-life? | t 1/2= [A]o/2k |
| Which of the following represents the equaton for a zero-order half-life? | t 1/2= [A]o/2k |
| Which of the following reactions would you predict to have the smallest orientation factor? | NOCl2 + NO –> 2 NOCl |
What is half-life derive expression?
Derivation of Half-Life Formula for Zero-Order Reactions Substituting t = t1/2, at which point [R] = [R]0/2 (at the half-life of a reaction, reactant concentration is half of the initial concentration).
What is half-life derive the relation between half-life and rate constant for the first-order reaction?
1. The relation between half-life and rate constant for first-order reaction: The integrated rate law for the first-order reaction is k = t A A t 2.303 t log 10 [ A ] 0 [ A ] t where, [A]0 is the initial concentration of reactant at t = 0. It falls to [A]t at time t after the start of the reaction.
What is half-life of reaction?
The half-life of a reaction is the time required for a reactant to reach one-half its initial concentration or pressure. For a first-order reaction, the half-life is independent of concentration and constant over time.
What is the second-order?
second-order (not comparable) (mathematics, logic) describing the second in a numerical sequence of models, languages, relationships, forms of logical discourse etc. Of secondary importance.
What is half-life period derive an expression for half-life period of a first-order reaction?
The half-life of a species in a chemical reaction is the time taken for the concentration of the same substance to fall towards half of its initial value. In the first-order reaction, the half-life of the reactant is ln(2)/k, where k is the rate constant of the reaction.
What is half-life period derive its derivation?
The half-life of a chemical reaction can be defined as the time taken for the concentration of a given reactant to reach 50% of its initial concentration (i.e. the time taken for the reactant concentration to reach half of its initial value). It is denoted by the symbol ‘t1/2’ and is usually expressed in seconds.
How do you find the half-life?
How to calculate half life? To find half-life: Find the substance’s decay constant. Divide ln 2 by the decay constant of the substance.
