Entropy-Time Relationship in an Isochoric Adiabatic System
The equation that connects entropy and time has been found out by static thermodynamics, dS/S = dVI/V0 = kd, VI internal volume. Constant k is a characteristic of each isochoric adiabatic process and likewise equals dT/Td. The constancy of k does not hold for a nonisochoric adiabatic system. Time...
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/184108 |
| Acceso en línea: | http://hdl.handle.net/10261/184108 |
| Access Level: | acceso abierto |
| Palabra clave: | Irreversibility thermodynamics Entropy-time equation Entropy maximum Boltzmann H Thermophysics |
| Sumario: | The equation that connects entropy and time has been found out by static thermodynamics, dS/S = dVI/V0 = kd, VI internal volume. Constant k is a characteristic of each isochoric adiabatic process and likewise equals dT/Td. The constancy of k does not hold for a nonisochoric adiabatic system. Time is introduced in the frame of thermodynamic variables as a genuine magnitude. The theoretically deduced entropy-time differential equation is empirically backed up by Newton cooling law. It was found out concerning thermodynamic equilibrium that irreversible heat capacity (CIR = TS/T) in approaching the equilibrium is alike to statistical Boltzmann H. The connection of H with temperature is presented. The integrated entropy-time function was modified by rotation of the coordinate axes to fulfill the necessary thermodynamic condition of minimal irreversible heat (dQIR TdS), which is not embodied in the primitive S- differential equation. The transformation gives rise to an entropy-time maximum point. The transformation conveys a contraction of both entropy and time and is in agreement with minimal action |
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