Home
Class 12
CHEMISTRY
Discuss the effect of temperature on the...

Discuss the effect of temperature on the rate of a reaction. Derive necessary equations in this contaxt.

Text Solution

Verified by Experts

Most of the chemical reactions are accelerated by increase of temperature.
`to` For a chemical reacton with rise of temperature by `10^(@)C` the reate constant in nearly dubled
`k=A.e^(-Ea//RT)`
A = Arrhenius factor.
`E_(a)` = activation Energy T = Temperature `(""^(@)K)`
R = gas constant `" 'k= A.e ^(-Ea//RT)`
`ln k = ln A - E_(a)//RT`
`2.303 log k =2.303 log A -E_(a)//RT`
`T_(1), T_(2)` are Temperatures
`k_(1)` is rate constnt at temperature `T_(1)`
`k_(2)` is rate constant at temperature `T_(2)`
`therefore 2.303(log k _(2)-log k_(1))=(-E_(a))/(R) ((1)/(T_(2))- (1)/(T_(1)))`
`log ""(k_(2))/(k_(1))=(E_(a))/(2.303 R) [(1)/(T_(1))-(1)/(T_(2))]`
The above equation describes the effect of temperature (T) on rate constant (k)
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|24 Videos
  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise DAM SURE|18 Videos
  • ELECTROCHEMISTRY & CHEMICAL KINETICS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SHORT ANSWER QUESTIONS|25 Videos
  • D AND F- BLOCK ELEMENTS AND CO-ORDINATION COMPOUNDS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|33 Videos
  • GENERAL PRINCIPLES OF MMETALLURGY

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise DAM SURE SAQ|1 Videos

Similar Questions

Explore conceptually related problems

What is the effect of temperature on the rate constant ?

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. If the rate oc reaction grwos 15.6 times on increasing the temperature by 30 K the temperature coefficient of the reaction will be nearly

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. The pre-exponential factor in the Arrhenius equation of a second order reaction has the units

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. Which of the following plot will be linear?

Derive ideal gas equation.

Discuss the methods of determining the order of reaction .