Final answer:
The chemical potential can be defined in terms of the partial molar Gibbs energy using the equation μ = RT ln(a).
Step-by-step explanation:
The chemical potential can be defined in terms of the partial molar Gibbs energy. The correct option is A) μ = RT ln(a).
Chemists use the concept of chemical potential to understand the behavior of substances in various processes. The chemical potential is represented by the symbol μ and is defined as the change in Gibbs energy per mole of substance at a given temperature and pressure. In this case, the chemical potential is related to the partial molar Gibbs energy and can be calculated using the equation μ = RT ln(a), where R is the gas constant, T is the temperature, and a is the activity of the substance.