[header] How to learn about the subject of thermodynamics as applied to chemical reactions [title] Define the term " thermodynamics ". [step] Thermodynamics is a science which is built upon experimental facts that cannot be proven. But no one has so far succeeded to refute these principles. 
There are two experimental facts upon which thermodynamics is built. These are: the law of conservation of energy upon which the first law of thermodynamics is built.