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Free CBSE - Class 12 Chemistry - Chemical Kinetics worksheets

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1.

The following data were obtained during the first order thermal decomposition of (SO_{2}Cl_{2}) at a constant volume. ((SO_{2}Cl_{2}(g) \rightarrow SO_{2}(g) + Cl_{2}(g)))

Calculate the rate of the reaction when total pressure is 0.65 atm.

2.

The rate constant for the decomposition of (N_{2}O_{5}) at various temperatures is given below:

Draw a graph between (\ln k) and (1/T) and calculate the values of (A) and (E_{a}). Predict the rate constant at 30° and 50°C.

3.
The rate constant for the decomposition of hydrocarbons is (2.418 \times 10^{-5}s^{-1}) at 546 K. If the energy of activation is 179.9 kJ/mol, what will be the value of pre-exponential factor.
4.
Consider a certain reaction (A \rightarrow Products) with (k = 2.0 \times 10^{-2}s^{-1}). Calculate the concentration of (A) remaining after 100 s if the initial concentration of (A) is (1.0 mol L^{-1}).
5.
Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with (t_{1/2} = 3.00) hours. What fraction of sample of sucrose remains after 8 hours ?
6.
The decomposition of hydrocarbon follows the equation
(k = (4.5 \times 10^{11}s^{-1}) e^{-28000K/T})
Calculate (E_{a}).
7.
The rate constant for the first order decomposition of (H_{2}O_{2}) is given by the following equation:
(\log k = 14.34 – 1.25 \times 10^{4}K/T)
Calculate (E_{a}) for this reaction and at what temperature will its half-period be 256 minutes?
8.
The decomposition of (A) into product has value of (k) as (4.5 \times 10^{3} s^{-1}) at 10°C and energy of activation (60 kJ mol^{-1}). At what temperature would (k) be (1.5 \times 10^{4}s^{-1})?
9.
The time required for 10% completion of a first order reaction at 298K is equal to that required for its 25% completion at 308K. If the value of (A) is (4 \times 10^{10}s^{-1}). Calculate (k) at 318K and (E_{a}).
10.
The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.
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