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Kopp's law can refer to either of two relationships discovered by the German chemist Hermann Franz Moritz Kopp (1817–1892).
- 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."
- In studying organic compounds, Kopp found a regular relationship between boiling points and the number of CH2 groups present.
Kopp–Neumann law
The Kopp–Neumann law, named for Kopp and Franz Ernst Neumann, states that the specific heat C per unit mass (in J·kg−1·K−1) for alloys can be calculated from the following equation:
where N is the total number of alloy constituents, and Ci and fi denote the specific heat and mass fraction of the i-th constituent.
References
Kopp's law Wikipedia(Text) CC BY-SA