1. Revolution and Order (1770-1815) CM1100 History of Chemistry: Gases and the Gas Laws

2. The Genesis of Fire “And God said: Let there be Fire” (The Ancient Greek word, Phao, means both Light and Fire) Building on Aristotle’s belief, Fire was regarded as one of the 4 key elements of alchemy To alchemists Fire represented purification and change Because of this key role many studies on the nature of Fire were performed in the 17 th and 18 th century

3. Flox and Phlogiston In the early 18 th century, Becher suggested that a hypothetical substance, called "inflammable earth“, was contained in every flammable material. It was released in the process of burning leaving the “pure” material (calx) The released “substance” was later called “PHLOGISTON" (from the Gk word FLOX meaning “flame of fire”) by Stahl