The addition of a catalyst, such as catalyst X, can significantly affect the rate of a chemical reaction, like reaction Y, by lowering the activation energy required for the reaction to occur. This allows the reaction to proceed at a faster rate, increasing the overall reaction rate.At a specific temperature, Z degrees Celsius, the effect of the catalyst on the reaction rate will depend on the nature of the catalyst and the reaction itself. Generally, as the temperature increases, the reaction rate will also increase due to the increased kinetic energy of the reacting molecules. However, the effect of the catalyst may be more or less pronounced at different temperatures.To determine the exact effect of catalyst X on the rate of reaction Y at Z degrees Celsius, it would be necessary to perform experiments under controlled conditions. By comparing the reaction rates with and without the catalyst at the specified temperature, one can quantify the impact of the catalyst on the reaction rate.