Rate constant (K) of a reaction has least value at

Step-by-step solution

The Arrhenius equation is given by K = A e^ -E_ a / (RT) , where K is the rate constant, A is the pre-exponential factor, E_ a is the activation energy, R is the gas constant, and T is the temperature in Kelvin. To minimize the value of K , the exponent -E_ a / (RT) must be as small as possible (i.e., the most negative value). This occurs when the magnitude of the exponent E_ a / (RT) is as large as possible. This requires E_ a to be high and T to be low. Therefore, the rate constant K has the least value at low te