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本文通过实验测定和数理统计方法,建立了工业铝酸钠溶液蒸汽压的数学模型,该方程为P=69.45+0.4968N_k-4.649T-0.01358N_kT+0.1043T~2,方程的拟合性检验表明,实际测定值与方程计算值的百分偏差均小于2.0％,可见方程简单,计算结果准确,使用方便,该方程还描述了溶液的蒸汽压随溶液中Na_2O_k浓度的增大而减小,随温度升高而增大的规律。
In this paper, the mathematical model of the vapor pressure of industrial sodium aluminate solution was established by experimental determination and mathematical statistics method, the equation is P = 69.45 + 0.4968N_k-4.649T-0.01358N_kT + 0.1043T ~ 2, the fitting test of the equation , The actual measured value and the percentage deviation of the calculated value of the equation are less than 2.0%, which shows that the equation is simple, the calculation result is accurate and the use is convenient. The equation also describes that the vapor pressure of the solution decreases as the concentration of Na 2 O_k in solution increases The law of increasing temperature increases.