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1、饱和蒸气压(saturated vapor pressure)在密闭条件中，在一定温度下，与液体或固体处于相平衡的蒸气所具有的压力称为饱和 蒸气压。同一物质在不同温度下有不同的蒸气压，并随着温度的升高而增大。不同液体饱和 蒸汽压不同，溶剂的饱和蒸汽压大于溶液的饱和蒸汽压；对于同一物质，固态的饱和蒸汽压 小于液态的饱和蒸汽压。例如，在30C时，水的饱和蒸气压为4132.982Pa，乙醇为10532.438Pa。 而在100C时，水的饱和蒸气压增大到101324.72Pa，乙醇为222647.74Pa。饱和蒸气压是液 体的一项重要物理性质，如液体的沸点、液体混合物的相对挥发度等都与之有关。饱和蒸气
2、压曲线水在不同温度下的饱和蒸气压Saturated Water Vapor Pressures at Different Temperatures温度(Temperature) t/C饱和蒸气 压 (Saturated water vapor pressure) /(x10TPa)温度(Temperature) t/C饱和蒸气 压 (Saturated water vapor pressure) /(x103Pa)温度(Temperature) t/C饱和蒸气 压 (Saturated water vapor pressure) /(x10TPa)00.61129125232.01250397
3、3.610.65716126239.242514041.220.70605127246.662524109.630.75813128254.252534178.940.81359129262.042544249.150.87260130270.022554320.2|60.93537131278.202564392.2|71.0021132286.572574465.181.0730133295.152584539.091.1482134303.932594613.7101.2281135312.932604689.4111.3129136322.142614766.1121.40271373
4、31.572624843.7131.4979138341.222634922.3|141.5988139351.092645001.8151.7056140361.192655082.3|161.8185141371.532665163.8|171.9380142382.112675246.3182.0644143392.922685329.8192.1978144403.982695414.3202.3388145415.292705499.9212.4877146426.852715586.4222.6447147438.672725674.0232.8104148450.75273576
5、2.7242.9850149463.102745852.4253.1690150475.722755943.1|263.3629151488.612766035.0273.5670152501.782776127.9283.7818153515.232786221.9|294.0078154528.962796317.2|304.2455155542.992806413.2314.4953156557.322816510.5324.7578157571.942826608.9335.0335158586.872836708.5345.3229159602.112846809.2355.6267
6、160617.662856911.1365.9453161633.532867014.1376.2795162649.732877118.3386.6298163666.252887223.7|396.9969164683.102897330.2|407.3814165700.292907438.0|417.7840166717.832917547.0428.2054167735.702927657.2438.6463168753.942937768.6449.1075169772.522947881.3459.5898170791.472957995.2|4610.094171810.782
7、968110.34710.620172830.472978226.84811.171173850.532988344.5|4911.745174870.982998463.5|5012.344175891.803008583.8|5112.970176913.033018705.45213.623177934.643028828.35314.303178956.663038952.65415.012179979.093049078.25515.7521801001.93059205.15616.5221811025.23069333.4|5717.3241821048.93079463.158
8、18.1591831073.03089594.2 D5919.0281841097.53099726.76019.9321851122.53109860.56120.8731861147.93119995.86221.8511871173.8312101336322.8681881200.1313102716423.9251891226.1314104106525.0221901254.231510551|6626.1631911281.931610694|6727.3471921310.1317108386828.5761931338.8318109846929.8521941368.031
9、9111317031.1761951397.6320112797132.5491961427.8321114297233.9721971458.5322115817335.4481981489.7323117347436.9781991521.4324118897538.5632001553.6325120467640.2052011568.432612204|7741.9052021619.732712364|7843.6652031653.6328125257945.4872041688.0329126888047.3732051722.9330128528149.3242061758.4
10、331130198251.3422071794.5332131878353.4282081831.1333133578455.5852091868.433413528|8557.8152101906.2335137018660.1192111944.633613876|8762.4992121983.633714053|8864.9582132023.2338142328967.4962142063.4339144129070.1172152104.2340145949172.8232162145.7341147789275.6142172187.8342149649378.494218223
11、0.5343151529481.4652192273.8344153429584.5292202317.834515533 二|9687.6882212362.5346157279790.9452222407.8347159229894.3012232453.8348161209997.7592242500.534916320|100101.322252547.935016521101104.992262595.935116825|102108.772272644.635216932|103112.662282694.135317138|104116.672292744.235417348105120.792302795.135517561106125.032312846.735617775107129.392322899.035717992108133.882332952.135818211109138.502343005.935918432110143.242353060.436018655|111148.122363115.736118881112153.132373171.836219110113158.292383288.636319340|114163.582393286.3364
