GCSE; WJEC; Rates of reaction Activation energy [Higher tier only]. Chemical reactions vary in speed. The rate of reaction measures how much product is made in a given time. For reactions to occur ...

Save guides, add subjects and pick up where you left off with your BBC account. A reaction profile includes the activation energy, which is the minimum energy needed by particles when they collide ...

In the course of work on the kinetics of this solid state reaction, the problem arose of deducing the reaction constant and the activation energy without exact knowledge of the reaction mechanism ...