0. Zeroth Law: When two bodies maintain [[Thermal Equilibrium|thermal equilibrium]] with a third body then the first two bodies must also be in thermal equilibrium 1. [[First Law of Thermodynamics|First Law]]: [[Energy]] can not be created or destroyed, only transferred and transformed 2. Second Law: The sum of [[Entropy|entropies]] in a system must lead to an increase in overall entropy 3. Third Law: As a system approaches [[Temperature|absolute zero]] the entropy of the system will approach a constant value