Chemistry in Context presents chemistry as a unified and integrated subject and shows the essential contributions it makes to society and industry. The text, which is easy to read and clearly laid out, is supported by numerous figures, photographs, tables, charts, flow diagrams and graphs. Each chapter ends with a summary of important points and a series of study questions. This third edition takes account of the significant changes in the GCE A-level chemistry syllabuses that have occured since the introduction of general Certificate of Secondary Education (GCSE) examinations. New chapters have been added on reacting quantities and equations, entropy and free energy, and synthetic routes for organic chemicals. The revision ensures that Chemistry in Context continues to cover all modern A-level and similar courses.