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Enthalpy and entropy ternary systems (ethylenglicol +water+grafit) and (ethylenglicol +water+soot)


S. Nazirov1, M. Anaqulov1, M. Zaripova1, M. Safarov1, S. Najmiddinov1, J. Zaripov1 and S. Tagoev1

1Tajik Technical University after named by ac. M.S.Osimi, Tajikistan

Keywords: first law of thermodynamics, systems energy, microscopic scale
property: particular property, enthalpy and entropy
material: ethylenglicol +water+grafit, ethylenglicol +water+soot

The first law of thermodynamics, like the conservation-of-mass principle, describes the conservation of a particular property. The first law expresses the manner in which a systems energy is altered by energy transfer across the system boundary and mass transport into and out of the system. The first law is a strict accounting procedure that describes the changes in the systems energy. The conservation of mass quantifies the change in the systems mass. Both conservation statements directly relate the change in a systems property to transfers at a boundary [1]. The second law of thermodynamics also relates a system property to energy transfer at a boundary, but the relation simply specifies the direction of change. Entropy is a property that is specified for every equilibrium state of a substance. Entropy represents the disorder, or uncertainty, of the microscopic scale, yet macroscopically it is used as all other properties [1]. The state postulate for a pure simple compressible substance states that two independent intensive properties specify the state. Therefore, entropy is an additional property that can be used to specify a state. As with all previous properties, data for entropy can be found in tabular, graphical, equation, and computer retrieval forms. Generally, two standards are used in choosing a fuel. The first addresses the amount of energy released in the combustion process on a mole or mass basis, and the second addresses the temperature of the combustion process. In contracts to binary fluids, ternary systems can demonstrate three different kind of azeotropy: positive, negative, and saddle-like. Ternary azeotropes appear to be almost independent of manifestation of azeotropy in binary pairs composing the ternary system, at least, their existence cannot be derived directly from the topological properties of phase diagrams of corresponding binaries. Thermodynamic description of ternary azeotropes has been obtained by application of the boundary states method (Boshkov,1992) to equilibrium conditions descry-bing a single phase [2-5]. The azeotropic branch of the phase tree for ternary fluids has been studied up to the level of boundary states. New types of azeotropic phase diagram in terms of distillation curves have been predicted for ternary fluids, than extend the existing classification (Guricov,1958) by incorporating azeotropic cuspus.

References
  1. 1. John R. Howell, Richard O. Buckius. Fundamentals of engineering thermodynamics. SI version,USA, 1987, pp. 9-63

  2. 2. D.J.Friend, M.L.Huber, C.D.Muzny, G.R.Hardin. Abstracts of Seventeenth Symposium on Thermophysical Properties. Boulder, Colorado USA, June 21-26, 2009, pp. 300

  3. 3. I.K.Kamilov. Fasovie perehodi I kriticheskie yavleniya v kondensirovannikh sredah. Mahachkala, 2002, pp.293-300

  4. 4. M.A.Zaripova, A.B.Badalov, M.M.Safarov. Teplofizicheskie i termodinamicheskie svoystva vodnikh rastvorov gidrazina I fenilgidrazina. – Dushanbe-2007, pp. 80-84

  5. 5. D.L.Timrot, S.L.Rivkin, A.M.Sirota, N.B.Vargaftic. Tablitsi thermodinamicheskih svoystv void I vodyanogo para. Moscow, “Gosenergoizdat, 1958, pp.95-100.

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