Which is a measure of the randomness of a system?

A) entropy
B) enthalpy
C) free energy
D) halogenation
E) stoichiometry

Entropy is a thermodynamic property that measures the randomness or disorder of a system. It is related to the number of possible microscopic arrangements of the system that would result in a given macroscopic state. The more disordered a system is, the higher its entropy. Enthalpy, free energy, halogenation, and stoichiometry are all important concepts in chemistry, but they do not specifically measure the randomness of a system.