Kopp's rule is used to calculate the heat capacity of

Answer: Option A

Kopp's rule states that the heat capacities of a molecular compound are sum of the contributions for each element in the compound. And it generally used to find the heat capacities of solids or liquid at $$20^{\text{o}}C$$   for example the heat capacity of calcium chloride $$\left(CaC{l}_2\right)$$   can be written as heat capacity of $$Ca+2\ast$$   heat capacity of $$Cl$$ .