(a)(i) What is meant by the rate of a chemical reaction?

(ii) Explain in terms of the vision theory, the effect of temperature increase on reaction rate.

 

(b) When hydrogen peroxide is exposed to air, it decomposes

(i) Write an equation for the reaction.

(ii) Outline an experiment to illustrate that effect of a named catalyst on the rate of decomposition.

(iii) Sketch an energy profile diagram to show the effect of the catalyst on the reaction rate, given that the reaction is exothermic.

(c)(i) Explain why enthalpy data alone cannot be used to predict whether a reaction can occur spontaneously or not.