Difference between rate of reaction and reaction rate constant are as follows:
|
RATE OF REACTION |
REACTION RATE CONSTANT |
| Rate of reaction is the change in concentration of a reactant or product per unit time. | It is a constant of proportionality in the rate law equation and is equal to the rate of reaction when the molar concentration of each of the reaction is unity. |
| The rate of reaction at any instant of time depends upon the molar concentrations of the reactants at that time. | The rate constant is constant for a particular reaction at a particular temperature and does not depend upon the concentrations of the reactants. |
| Its units are always moles litre<sub>-1</sub> time<sup>-1</sup> | It units depend upon the order or reaction. A reaction is said to be of the zero order, first order, second order, and third order if some of concentration terms is equal to 0, 1, 2 and 3 respectively |
