Why Chemical Reactions Happen : Paperback : Oxford University Press : 9780199249732 : 0199249733 : 05 Jun 2003 : By tackling the most central ideas in chemistry, Why Chemical Reactions Happen provides the reader with all the tools and concepts needed to think like a chemist. The text takes a unified approach to the subject, avoiding the traditional divisions of physical, inorganic and organic chemistry and so helps the reader to develop a real overview of chemical processes.