Kopp's law [SEP] named after
Kopp's law
Kopp's law can refer to either of two relationships discovered by the German chemist Hermann Franz Moritz Kopp (1817–1892).
1. Kopp found "that the molecular heat capacity of a solid compound is the sum of the atomic heat capacities of the elements composing it; the elements having atomic heat capacities lower than those required by the Dulong–Petit law retain these lower values in their compounds."
2. In studying organic compounds, Kopp found a regular relationship between boiling points and the number
mass density
- ultimate tensile strength
- thermal conductivity
- electrical conductivity
See also.
When considering the empirical correlation of some physical properties and the chemical composition of compounds, other relationships, rules, or laws, also closely resembles the rule of mixtures: 
- Amagat's law – Law of partial volumes of gases
- Gladstone–Dale equation – Optical analysis of liquids, glasses and crystals
- Kopp's law – Uses mass fraction
- Kopp–Neumann law – Specific heat for alloys