I have looked this theory up on google and found that the theory is that when metal is burnt calx (metal oxide) and phlogiston is created (metal --> calx + phlogiston). Then I found out that phlogiston is a substance supposed by 18th century scientists to exist in all combustible bodies and to be released during combustion. But it later got disproved by Antoine Lavoisier who proved that metal and oxygen when burnt produced calx.
So my questions are:
- What exactly is the phlogiston theory and if my understanding of it correct?
- What exactly did Georg Ernst Stahl (discovered the phlogiston theory) think phlogiston was?
- Why did the 18th century scientists believe that phlogiston existed in all combustible bodies and why not just a product created during the combustion reaction?