乙醇t-x-y

乙醇-水平衡数据 常压下乙醇—水系统 t—x—y 数据如表 1 所示 表表 1 乙醇乙醇——水系统水系统 t——x——y 数据数据 乙醇摩尔数/%乙醇摩尔数/%沸点 t/℃气相液相沸点 t/℃气相液相 99.90.0040.0538227.356.44 99.80.040.5181.333.2458.78 99.70.050.7780.642.0962.22 99.50.121.5780.148.9264.70 99.20.232.9079.8552.6866.28 99.00.313.72579.561.0270.29 98.750.394.5179.265.6472.71 97.650.798.7678.9568.9274.69 95.81.6116.3478.7572.3676.93 91.34.1629.9278.675.9979.26 87.97.4139.1678.479.8281.83 85.212.6447.4978.2783.8784.91 83.7517.4151.6778.285.9786.40 82.325.7555.7478.1589.4189.41 乙醇相对分子质量：46；水相对分子质量：18 25℃时的乙醇和水的混合液的表面张力与乙醇浓度之间的关系为：58453210314. 410348. 100163. 009604. 09726. 283364.67xxxxxσ 式中 σ——25℃时的乙醇和水的混合液的表面张力，N／m； x——乙醇质量分数，％。

其他温度下的表面张力可利用下式求得2 . 11221    TTTTCC＝σσ式中 σ1——温度为T1时的表面张力；N／m； σ2——温度为T2时的表面张力；N／m； TC——混合物的临界温度，TC＝∑xiTci ，K； xi——组分 i 的摩尔分数； TCi——组分 i 的临界温度， K表表 2 弓形降液管的宽度与面积：弓形降液管的宽度与面积：LW/DWd/DAf/ATLW/DWd/DAf/AT0.400.0420.0140.410.0440.0150.710.1480.092 0.420.0460.0170.720.1530.097 0.430.0490.0180.730.1580.102 0.440.0510.0190.740.1640.107 0.450.0530.0210.750.1690.112 0.460.0560.0220.760.1750.118 0.470.0590.0240.770.1810.123 0.480.0610.0250.780.1870.129 0.490.0640.0270.790.1930.136 0.500.0670.0290.800.2000.1420.510.0700.0310.810.2070.149 0.520.0730.0330.820.2140.1570.530.0760.0350.830.2210.1640.540.0790.0370.840.2290.172 0.550.0820.0390.850.2370.181 0.560.0860.0420.860.2450.190 0.570.0890.0440.870.2530.199 0.580.0930.0470.880.2630.209 0.590.0960.0490.890.2720.220 0.600.1000.0520.900.2820.2320.610.1040.0550.910.2930.244 0.620.1080.0580.920.3040.257 0.630.1120.0610.930.3160.271 0.640.1160.0650.940.3290.287 0.650.1200.0680.950.3440.304 0.660.1240.0720.960.3600.324 0.670.1290.0750.970.3780.347 0.680.1330.0790.980.4010.374 0.690.1380.0830.990.4290.410 0.700.1430.0881.000.5000.500。