Mathematically, the absolute entropy of any system at zero temperature is the natural log of the number of ground states times Boltzmann's constant kB = 1.38×10−23 J K−1. {\displaystyle 0~~0. So the thermal expansion coefficient of all materials must go to zero at zero kelvin. × 1.38 − Jan 03 2021 05:08 AM ln With the development of statistical mechanics, the third law of thermodynamics (like the other laws) changed from a fundamental law (justified by experiments) to a derived law (derived from even more basic laws). 10 The third law of thermodynamics is essentially a statement about the ability to create an absolute temperature scale, for which absolute zero is the point at which the internal energy of a solid is precisely 0. For example, if bodies AB in thermal equilibrium with body C, then A & B must be in thermal equilibrium with each other. For Fermi gases. The applications of this law have been used to predict the behavior of different materials to temperature changes. The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the number of different ground states it has. Q At the melting pressure, liquid and solid are in equilibrium. The entropy of a bounded or isolated system becomes constant as its temperature approaches absolute temperature (absolute zero). The laws define how work, heat and energy affect a system. • THIRD LAW OF THERMODYNAMICS (noun) The noun THIRD LAW OF THERMODYNAMICS has 1 sense:. The specific heats given by Eq. Traditionally, thermodynamics has stated three fundamental laws: the first law, the second law, and the third law. 1. 2 0 K However, ferromagnetic materials do not, in fact, have zero entropy at zero temperature, because the spins of the unpaired electrons are all aligned and this gives a ground-state spin degeneracy. In this process, the finite usable energy is now converted to unusable energy. K Illustration of a system in thermodynamics. 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