The correct answer is: (4) All of the options can lead to a change in the rate constant K of a reaction.
(1) A change in pressure: For gaseous reactions, changes in pressure can affect the reaction rate, especially if the reaction involves a change in the number of moles of gas. In some cases, increasing the pressure may increase the rate constant, while in other cases, it may not have a significant effect.
(2) Change in temperature: Changing the temperature can significantly impact the rate constant of a reaction. In most cases, an increase in temperature leads to an increase in the rate constant due to the Arrhenius equation, which describes the temperature dependence of the rate constant.
(3) Change in the volume of the reaction vessel: Changing the volume can affect the concentration of reactants, which, in turn, can influence the reaction rate. If the volume is decreased, the concentration of reactants may increase, potentially increasing the rate constant, and vice versa.
Therefore, all of the listed options can cause changes in the rate constant K of a reaction, either directly or indirectly through their influence on the reaction conditions. |
