Empirical Determination of the Intrinsic Behaviors of the Pressure, Volume, Temperature and Entropy for the Isothermal, Isobaric, Isochoric and Isoentropic Processes for Polyethylene: II. The Intrinsic Behaviors of Internal Energy, Enthalpy, Helmholtz Free Energy and Gibbs Free Energy - Saeki, Susumu (Journal of Macromolecular Science: Physics, 2026)