Thermodynamic properties of liquid mixtures of carbon monoxide and methane |
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Authors: | Jorge C.G. Calado Henrique J.R. Guedes Manuel Nunes da Ponte William B. Streett |
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Affiliation: | Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Roviso Pais, 1096 Lisboa Portugal |
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Abstract: | The equations of state of liquid methane at 125.00 K and of six liquid mixtures of carbon monoxide and methane at 116.30, 120.00 and 125.00 K have been measured from just above the saturation vapour pressure to the freezing pressure of methane. The results show that the excess volume VE is large and negative at low pressures but becomes less negative as the pressure is increased, being almost zero at the highest pressures. The curve of VE against the mole fraction x is very asymmetrical at low pressures, but becomes more symmetrical with rising pressure.The effect of pressure on the excess functions GE, HE and T·SE has been calculated. HE and T·SE prove to be much more sensitive to pressure than GE.Conformal solution theory, in the van der Waals one-fluid form, reproduces the experimental results very successfully. |
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Keywords: | Author to whom correspondence should be addressed. |
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