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A microscopic model for the phase diagramm of a pur substance

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Abstract

Recently, a two-dimensional model that leads to …rst order phase transitions has been proposed. This model also leads to phase diagrams which present the characteristics observed in phase diagrams of the substances : three thermodynamic phases, three coexistence curves, a triple point and a critical point. In the present study, the calculation of the latent heats of the di¤erent …rst order phase transitions as well as the experimental data concerning the phase diagram of a pure substance, here carbon dioxyde, are introduced into the two-dimensional model. By assuming that the pressure does not modify the chemical bond between two nearest-neighbors atoms but modi…es that betwen two next nearest-neighbors atoms we can calculated the phase diagram of the compound in (bar; Kelvin) plane and the Joule values of the di¤erent latent heats of transition. Moreover, the energy value of the chemical bond between two nearest-atoms is obtained.
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hal-03373139 , version 1 (11-10-2021)

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  • HAL Id : hal-03373139 , version 1

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Jamil A Nasser. A microscopic model for the phase diagramm of a pur substance. 2021. ⟨hal-03373139⟩
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