An analytical equation of state for mercury

被引:17
作者
Mehdipour, N
Boushehri, A
机构
[1] Department of Chemistry, Shiraz University
关键词
cohesive energy; corresponding states; equation of state; mercury;
D O I
10.1007/BF02575262
中图分类号
O414.1 [热力学];
学科分类号
摘要
This paper presents a procedure for predicting the equation of state of mercury, by including mercury in the scope of a new statistical mechanical equation of state that is known for normal fluids. The scaling constants are the latent heat of vaporization and the density at the melting temperature, which are related to the cohesive energy density. Since experimental data for the second virial coefficient of mercury are scarce, a corresponding-states correlation of normal fluids is used to calculate the B(T) of mercury. The free parameter of the ISM equation, lambda, compensates for the uncertainties in B(T). Also, we can predict the values of two temperature-dependent parameters, alpha(T) and b(T), with satisfactory accuracy from a knowledge of Delta H-vap and rho(m), without knowing any details of the intermolecular potentials. While the values of B(T) are scarce for mercury and the vapor pressure of this metal at low temperatures is very small, an equation of state for mercury from two scaling parameters (Delta H-vap,H-rho m) predicts the density of Hg from the melting point up to 100 degrees above the boiling temperature to within 5%.
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页码:1329 / 1334
页数:6
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