A New Two-Parameter Equation of State for Pure Gases of Hard Spheres with An Attractive Potential

상태방정식, 상태식, 격자 기체ABSTRACT. Using Carnahan-Starling equation for hard spheres and a lattice model with an attractive potential, a new two-parameter equation of state for pure gases is derived. Using this equation, compressibility factors are calculated and comparedwith Nelson-Obert generalized compressibility factor charts. The results show that the agreement of this equation with theexperimental Nelson-Obert charts is similar to that of Redlich-Kwong equation in the average. But parameters and terms ofthe new equation have physical meanings which are more definite than those of Redlich-Kwong equation.Key words: Equation of state, Lattice gas