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在混合理想气体的计算中,有这样一类问题:已知各组分质量(或体积)与系统质量(或体积)的比值,求混合理想气体的平均摩尔质量、组分压强和组分密度。对于这一类问题,一般都采用求解具体问题的方法来进行的。本文则对其规范计算法进行一些讨论。文中的M、V、v、p、ρ、T分别表示整个系统的质量、体积、摩尔数、压强、密度和温度;M_i、μ_i、ν_i分别表示第i种组分的质量、摩尔质量和摩尔数。i=1、2、……n,表示组分序号。一、已知各组分的质量与系统的质量比M_i/M 1.求平均摩尔质量μ根据平均摩尔质量的含义有由此得由(1)式可求得μ之值。 2.求组分压强p_i 对第i种组分使用状态方程,有
In the calculation of an ideal mixture of gases, there is a class of problems: the ratio of the mass (or volume) of each component to the mass (or volume) of the system is known, and the average molar mass, component pressure, and component density of the ideal mixture are obtained. . For this type of problem, it is generally carried out by solving specific problems. This article discusses some of its normative calculations. The M, V, v, p, ρ, and T in the text respectively represent the mass, volume, number of moles, pressure, density, and temperature of the entire system; M_i, μ_i, and ν_i represent the mass, molar mass, and mole of the i-th component, respectively. number. i=1, 2, ..., n, indicates the component number. First, the mass ratio of the known components to the mass ratio of the system M_i/M 1. The average molar mass μ is derived from the meaning of the average molar mass. Thus, the value of μ can be obtained from (1). 2. Find the component pressure p_i using the equation of state for the ith component.