Question

what is equivalent to free energy?
disorder
potential energy
kinetic energy
heat of the system

Explanation:

Free - energy is related to the potential energy available to do work in a system. Disorder is related to entropy, kinetic energy is energy of motion, and heat is a form of energy transfer. Potential energy can be thought of as the energy available for a system to perform useful work, which is related to free - energy concepts.

Answer:

potential energy