Chapter 17.1, Problem 3RQ

Interpretation Introduction

Interpretation:

On the basis of collision theory, the reason for the reactions to occur more slowly at a lower temperature, need to be explained.

Concept introduction:

Due to the change in temperature, the reaction rate is also affected.

Answer to Problem 3RQ

The reaction rate occurs slowly at the low temperature because by decreasing the temperature, the molecules of the reactants move slower and so the number of collisions is also decreased. Due to which the reaction occurs slowly.

Explanation of Solution

To carry out a chemical reaction, the molecules of the reactants must collide with each other with a suitable amount of energy and in the right orientation. By heating the mixture, the energy levels of the involved molecules are rises. So, by increasing the temperature the molecules move faster and then they will collide with each other more frequently. Similarly, when the temperature is decreased then the number of collisions decreases. So, the reaction occurs slowly due to the lack of the number of collisions at low temperature.

Conclusion

The reaction occurs slowly at a low temperature because the number of collisions is decreased.