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Explain The Third Law Of Thermodynamics. Explain what measurements are needed to evaluate the absolute standard entropy of a gas phase pure substance at 298 k. The third law of thermodynamics states that when the temperature of a system approaches absolute zero, the entropy of that system approaches a constant value.

At zero temperature, the system must be in a state with the minimum thermal energy. The entropy of a perfect crystal at absolute zero is exactly equal to zero. Explain what measurements are needed to evaluate the absolute standard entropy of a gas phase pure substance at 298 k.

Third Law Of Thermodynamics Chemistry. The third law of thermodynamics establishes the zero for entropy as that of a perfect, pure crystalline solid at 0 k. The third law of thermodynamics also refers to a state known as “absolute zero”.

The third law was developed by the chemist walther nernst during. Lim st→0 = 0 (1) where. If δs univ 0, the process is nonspontaneous, and if δs univ = 0, the system is at equilibrium.