Chemistry : Chemical Kinetics

The rate constant for the first-order decomposition of H2O2 is given by the following equation:

Calculate Ea for this reaction and rate constant k if its half-life period be 200 minutes. (Given: R = 8.314 JK^–1mol^–1).

For a reaction: 

rate =k

i) Write the order and molecularity of this reaction.
ii) Write the unit of k.

For the first order thermal decomposition reaction, the following data were obtained:
C₂H₅Cl (g) --> C₂H₄ (g) +HCl(g)

T/s         Total pressure/atm
0               0.30
300            0.50

Calculate the rate constant
(Given: log 2=0.301, log =0.4771, log 4 =0.6021)

Define activation energy of a reaction.

The thermal decomposition of HCO₂H is a first-order reaction with a rate constant of 2.4 x 10^-3 s^-1 at a certain temperature. Calculate how long will it take for three-fourths of the initial quantity of HCO₂H to decompose.

(log 0.25 = - 0.6021)

What do you understand by the rate law and rate constant of a reaction?

Identify the order of a reaction if the units of its rate constant are:

(i) L^-1 mol s^-1

What is the effect of temperature on chemisorption?

For a chemical reaction R → P, the variation in the concentration (R) vs. time (t) plot is given as,


(i) Predict the order of the reaction.
(ii) What is the slope of the curve?

The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :
SO₂Cl₂ (g) → SO₂ (g) + Cl₂ (g)

Calculate the rate constant.
(Given : log 4 = 0·6021, log 2 = 0·3010)

For a reaction R → P, half-life (t_1/2) is observed to be independent of the initial concentration of reactants. What is the order of reaction?