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 law of Dulong and Petit 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.
Read more about Kopp's Law: Kopp–Neumann Law
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