Question

Rate constant k of a reaction varies with temperature T according to the equation

1

log log

2.303

Ea K A

R T

       . When a graph of log k is plotted vs

1

T

, a straight line

with slope -4250 is obtained. Calculate the energy of activation. (Given R =

8.314J/Kmol​

Answer 1

Answer:

with slope -4250 is obtained. Calculate the energy of activation. (Given R =

8.314J/Kmol

Answer 2

Explanation:

Arrhenius equation - The effect of temperature on reaction rate

Generally, the rate of a reaction increase with increasing temperature. However, there are very few exceptions. The magnitude of this increase in rate is different for different reactions. As a rough rule, for many reactions near room temperature, reaction rate tends to double when the temperature is increased by 10ºC .

A large number of reactions are known which do not take place at room temperature but occur readily at higher temperatures. Example: Reaction between H2 and O2 to form H2O takes place only when an electric spark is passed.

Arrhenius suggested that the rates of most reactions vary with temperature in such a way that the rate constant is directly proportional to e-(E0/RT) and he proposed a relation between the rate constant and temperature.

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