Hess's law

Hess's law was made by G.H Hess, and through it he found out when 2 or more chemical reactions became one, the heat of reaction also became one. He made up his law by using the first law of thermodynamics, which is a saying about the law of conservation being able to be added to chemical reactions. Sometimes they may disappear entirely if it is on different sides of the reactions by itself.

 References 

Category:Thermodynamics
Category:Physical chemistry