Carnot heat engine efficiency with a paramagnetic gas
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The ideal gas approach is very useful in the study of behavior of the compressible fluids because it considers that the gas is composed of many randomly point particles and the interactions between them are perfectly elastic. The ideal gas concept is very important in the analysis of thermodynamic systems and in statistical mechanics. A system that can be studied with this approximation is the ideal paramagnetic gas, which consists of molecules where each of them possesses a magnetic moment in the presence of an external magnetic field. In this paper, we extended the work of Malaver (2015, 2018) for a variable Chaplygin gas to a paramagnetic medium and we have obtained some equations that describe thermodynamic behavior in an ideal paramagnetic gas. It has been derived an expression for the thermal efficiency of Carnot heat engine with a paramagnetic gas as working substance. We found that the efficiency depends on the limits of maximum and minimal temperature imposed on the Carnot cycle, as in the ideal gas, photon gas and variable Chaplygin gas.
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