Law of conservation of energy and Law of thermodynamics

Law of conservation of energy noun - The fundamental principle of physics that the total energy of an isolated system is constant despite internal changes.

Law of thermodynamics and law of conservation of energy are semantically related. In some cases you can use "Law of thermodynamics" instead a noun phrase "Law of conservation of energy".

Law of thermodynamics noun - (physics) a law governing the relations between states of energy in a closed system.

Law of conservation of energy and law of thermodynamics are semantically related. Sometimes you can replace phrase "Law of conservation of energy" with "Law of thermodynamics", this phrases are similar.