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Question
Burning of coal is represented as C(s)+O2(g)→CO2(g). The rate of this reaction is increased by:
Burning of coal is represented as C(s)+O2(g)→CO2(g). The rate of this reaction is increased by:
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Solution
The correct option is B Powdering the lumps of coal
FACTORS AFFECTING THE RATE OF REACTION: (i) Concentration : Law of mass action enunciates that greater is the conc. of the reactants, the more rapidly the reaction proceeds.
(ii) Pressure (Gaseous reaction) : On increasing the pressure, volume decreases and conc. increases and hence the rate increases.
(iii) Temperature : It is generally observed that rise in temperature increases the reaction rate.
(iv) Nature of the reactants : The rate depends upon specific bonds involved and hence on the nature of reactants.
(v) Surface area of the reactants : In heterogeneous reactions, more powdered is the form of reactants, more is the velocity. [as more active centres are provided]
So, the rate of reaction will increase by powdering the lumps of coal as surface area increases in that case.
FACTORS AFFECTING THE RATE OF REACTION:
(i) Concentration : Law of mass action enunciates that greater is the conc. of the reactants, the more rapidly the reaction proceeds.
(ii) Pressure (Gaseous reaction) : On increasing the pressure, volume decreases and conc. increases and hence the rate increases.
(iii) Temperature : It is generally observed that rise in temperature increases the reaction rate.
(iv) Nature of the reactants : The rate depends upon specific bonds involved and hence on the nature of reactants.
(v) Surface area of the reactants : In heterogeneous reactions, more powdered is the form of reactants, more is the velocity. [as more active centres are provided]
So, the rate of reaction will increase by powdering the lumps of coal as surface area increases in that case.
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