Question

- (a) What factors determine whether a collision between two molecules will lead to a chemical reaction?

(b) According to the collision model, why does temperature affect the value of the rate constant? (c) Does the rate constant for a reaction generally increase or decrease with an increase in reaction temperature?

Answer 1

(a) What factors determine whether a collision between two molecules will lead to a chemical reaction?

Solution :- The energy of the collision and the orientation of the molecules which are colliding determines if the collision is effective or not for the chemical reaction.

(b) According to the collision model, why does temperature affect the value of the rate constant?

Solution :- The increase in the tremperature increases the kinetic energy of the moleucles beucase of the increasing the speed and the collision frequency. Therefore increase in collision freqeuency leads to more effective collisions so the reaction shifts to the forward direction therefore the rate constant is dependent on the temperature.

(c) Does the rate constant for a reaction generally increase or decrease with an increase in reaction temperature?

Solution :- In general the increase in the temperature increases the energy of the moleucles so in general the increase in temperature causes the increase in the rate constant of the reaction.