Heat capacity and entropy

[406169222]

How does the Third Law help us define standard molar entropies? How can we calculate standard molar entropies?

[Michael Yacoub 3K]

Standard molar entropies are usually given values that are used to determine the total entropy change of a reaction by adding the standard molar entropies of the products and subtracting them from standard molar entropies of the reactants. The S value from the equation for the third law of thermodynamics is used to calculate the entropy of a specific system of usually just one molecule where we are considering entropy based on positional disorder through degeneracy.

[105717435]

The Third Law of Thermodynamics provides a reference point (absolute zero entropy) to define standard molar entropies, which can be calculated using experimental data such as heat capacity measurements and statistical mechanics principles.