Chemistry Class 12 NCERT Solutions: Chapter 4 Chemical-Kinetic Part 11

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Q: 22. The rate constant for the decomposition of at various temperatures is given below:

Q_22_Table of the Rate Constant for the Decomposition
Q_22_Table of the Rate Constant for the Decomposition

0

20

40

60

80

Draw a graph between ln and and calculate the values of A and .

Predict the rate constant at .

Answer:

From the given data, we obtain

Q_22_1_Table of Rrate Constant for the Decomposition of N2 O5 at Various Temperatures
Q_22_1_Table of Rrate Constant for the Decomposition of N2 O5 at Various Temperatures

0

20

40

60

80

273

293

313

333

353

Table of Rate Constant for the Decomposition of N2O5 at Vari …

Rate Constant for the Decomposition of N2O5

Slope of the line,

According to Arrhenius equation,

Slope

Again,

When

Then,

Therefore,

When

Then,

Therefore,

Again, when

Therefore,

Q: 23. The rate constant for the decomposition of hydrocarbons is . If the energy of activation is , what will be the value of pre-exponential factor.

Answer:

According to the Arrhenius equation,

Therefore,

Developed by: