Nernst's postulate derived directly from the vanishing heat capacity at zero temperature
Department of Physics, Xiamen University - Xiamen
2 Ørsted Laboratory, University of Copenhagen Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
Accepted: 26 June 2001
We show that Nernst's original postulate follows directly from a vanishing heat capacity at zero temperature without further constraints. Thermodynamic stability of the system along with the independence of the other thermodynamic state variables ensures a sufficiently slow temperature approach to zero that the change of the entropy of the system vanishes at least as rapidly as the heat capacity.
PACS: 05.70.Ce – Thermodynamic functions and equations of state / 65.20.+w – Thermal properties of liquids: heat capacity, thermal expansion, etc
© EDP Sciences, 2001