Question

Which statement is correct about the rate of most chemical reactions? It increases when the concentration of reactants decreases. It does not depend on the concentration of reactants. It increases when the temperature increases. It does not depend on the temperature.

Answer 1

Answer:

It increases when the temperature increases.

Explanation:

• According to Arrhenius relation: k = Ae(-Ea/RT).

• The rate constant of the reaction and also the rate of the reaction increases exponentially with increasing the temperature of the reaction.

• As the temperature increases, the no. of molecules that can posses the critical energy (activation energy) to initiate the chemical reaction and pass the energy barrier increases.