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.
[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.