First Law of Thermodynamics
The First Law of Thermodynamics states that the increase in internal energy of a closed system equals the amount of heat energy added minus the work performed by the system.
Mathematically, this is described as follows:
A ramification of this is the Principle of conservation of energy ; the amount of energy in the closed system of the universe remains constant. This can be combined with the principle of Mass-Energy Equivalence to demonstrate that the amount of mass in the universe is constant.
- Wile, Dr. Jay L. Exploring Creation With Chemistry. Apologia Educational Ministries, Inc. 1998
- “This law is considered the most powerful and most fundamental generalization about the universe that scientists have ever been able to make. No one knows why energy is conserved... All that anyone can say is that in over a century and a quarter of careful measurement scientists have never been able to point to a definite violation of energy conservation, either in the familiar everyday surroundings about us, or in the heavens above or in the atoms within.” Issac Asimov, Smithsonian Institution Journal, 1970, p.6 (quoted)