Flashcards: Chemical Kinetics | Chemistry for JEE Main & Advanced PDF Download

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Flashcards: Chemical Kinetics
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Flashcards: Chemical Kinetics Chemical Kinetics • The branch of chemistry, which deals with the 
study of reaction rates and their mechanisms, 
called chemical kinetics. • Thermodynamics tells only about the 
feasibility of a reaction whereas chemical 
kinetics tells about the rate of a reaction. • For example, thermodynamic data indicate 
that diamond shall convert to graphite but in 
reality the conversion rate is so slow that the 
change is not perceptible at all.
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Flashcards: Chemical Kinetics Chemical Kinetics • The branch of chemistry, which deals with the 
study of reaction rates and their mechanisms, 
called chemical kinetics. • Thermodynamics tells only about the 
feasibility of a reaction whereas chemical 
kinetics tells about the rate of a reaction. • For example, thermodynamic data indicate 
that diamond shall convert to graphite but in 
reality the conversion rate is so slow that the 
change is not perceptible at all. Chemical Kinetics • Kinetic studies not only help us to determine 
the speed or rate of a chemical reaction but 
also describe the conditions by which the 
reaction rates can be altered. • The factors such as concentration, 
temperature, pressure and catalyst affect the 
rate of a reaction.
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Flashcards: Chemical Kinetics Chemical Kinetics • The branch of chemistry, which deals with the 
study of reaction rates and their mechanisms, 
called chemical kinetics. • Thermodynamics tells only about the 
feasibility of a reaction whereas chemical 
kinetics tells about the rate of a reaction. • For example, thermodynamic data indicate 
that diamond shall convert to graphite but in 
reality the conversion rate is so slow that the 
change is not perceptible at all. Chemical Kinetics • Kinetic studies not only help us to determine 
the speed or rate of a chemical reaction but 
also describe the conditions by which the 
reaction rates can be altered. • The factors such as concentration, 
temperature, pressure and catalyst affect the 
rate of a reaction. Rate of a Chemical Reaction • The speed of a reaction or the rate of a 
reaction can be defined as the change in 
concentration of a reactant or product in unit 
time. It can be expressed in terms of: • (i) the rate of decrease in concentration of 
any one of the reactants, or • (ii) the rate of increase in concentration of 
any one of the products.
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Flashcards: Chemical Kinetics Chemical Kinetics • The branch of chemistry, which deals with the 
study of reaction rates and their mechanisms, 
called chemical kinetics. • Thermodynamics tells only about the 
feasibility of a reaction whereas chemical 
kinetics tells about the rate of a reaction. • For example, thermodynamic data indicate 
that diamond shall convert to graphite but in 
reality the conversion rate is so slow that the 
change is not perceptible at all. Chemical Kinetics • Kinetic studies not only help us to determine 
the speed or rate of a chemical reaction but 
also describe the conditions by which the 
reaction rates can be altered. • The factors such as concentration, 
temperature, pressure and catalyst affect the 
rate of a reaction. Rate of a Chemical Reaction • The speed of a reaction or the rate of a 
reaction can be defined as the change in 
concentration of a reactant or product in unit 
time. It can be expressed in terms of: • (i) the rate of decrease in concentration of 
any one of the reactants, or • (ii) the rate of increase in concentration of 
any one of the products. Consider a hypothetical reaction, assuming that the volume of 
the   system remains constant        R ? P One mole of the reactant R produces one mole of the product 
P. If  [R]1 and [P]1 are the concentrations of R and  respectively 
at time t1and [R]2 and [P]2 are their concentrations at time t2 
then,            ?t = t2 – t1 ?[R] = [R]2 – 
[R]1 ? [P] = [P]2 – 
[P]1 & The square brackets in the above expressions are used to express molar 
concentration. The Rate of a Chemical Reaction