水的饱和蒸汽压与温度对应表

1、水的饱和蒸汽压与温度对应表一、水的饱和蒸汽压与温度的关系蒸汽压是一定外界条件下，液体中的液态分子会蒸发为 气态分子，同时气态分子也会撞击液面回归液态。这是单组 分系统发生的两相变化，一定时间后，即可达到平衡。平衡 时，气态分子含量达到最大值，这些气态分子对液体产生的 压强称为蒸气压。水的表面就有水蒸气压，当水的蒸气压达到水面上的气 体总压的时候，水就沸腾。我们通常看到水烧开，就是在100 摄氏度时水的蒸气压等于一个大气压。蒸气压随温度变化而 变化，温度越高，蒸气压越大，当然还和液体种类有关。一定的温度下，与同种物质的液态（或固态）处于平衡状 态的蒸气所产生的压强叫饱和蒸气压，它随温度升高而增

2、加。如：放在杯子里的水，会因不断蒸发变得愈来愈少。如 果把纯水放在一个密闭的容器里，并抽走上方的空气。当水 不断蒸发时，水面上方气相的压力，即水的蒸气所具有的压 力就不断增加。但是，当温度一定时，气相压力最终将稳定 在一个固定的数值上，这时的气相压力称为水在该温度下的 饱和蒸气压力。当气相压力的数值达到饱和蒸气压力的数值 时，液相的水分子仍然不断地气化，气相的水分子也不断地 冷凝成液体，只是由于水的气化速度等于水蒸气的冷凝速 度，液体量才没有减少，气体量也没有增加，液体和气体达 到平衡状态。所以，液态纯物质蒸气所具有的压力为其饱和 蒸气压力时，气液两相即达到了相平衡。饱和蒸气压是物质 的一个重

3、要性质，它的大小取决于物质的本性和温度。饱和 蒸气压越大，表示该物质越容易挥发。二、水的饱和蒸汽压与温度对应表水的饱和蒸汽压与温度对应表超饱蒸气压kPa温度饱和蒸气压kPa侬饱和蒸气压kPa00.61129125232.012503973.610.65716126239.242514041.220.70605127246.662524109.630.75813128254.252534178.940.81359129262.042544249.150.8726130270.022554320.260.93537131278.22564392.271.0021132286.572574465.1

4、81.0731332951482134303.932594613.7101.2281135312.932604689.4111.3129136322.142614766.1121.4027137331.572624843.7131.4979138341.2226349223141.5988139351.092645001.8151.7056140361.192655082.3161.8185141371.532665163.8171.938142382.112675246.3182.0644143392.922685329.8C.192.1978144403.9826

5、95414.3202.3388145415.292705499.9212.4877146426.852715586.4222.6447147438.672725674.0232.8104148450.752735762.7242.9850149463.102745852.4253.16901504乃.722755943.1263.3629151488.612766035.0273.5670152501.782776127.9283.7818153515.232786221.9294.0078154528.962796317.2304.2455155542.992806413.2314.4953

6、156557.322816510.5324.7578157571.942826608.9335.0335158586.872836708.5345.3229159602.112846809.2355.62671606亿662856911.1365.9453161633.532867014.1376.2795162649.732877118.3386.6298163666.252887223.7396.9969164683.102897330.2407.3814165700.292907438.0417.7840166717.832917547.0428.2054167735.702927657

7、.2438.6463168753.942937768.6449.1075169772.522947881.3459.5898170791.472957995.24610.094171810.782968110.34710.62172830.472978226.84811.171173850.532988344.54911.745174870.982998463.55012.344175891.803008583.85112.97176913.033018705.45213.623177934.643028828.35314.303178956.663038952.65415.012179979

8、.093049078.25515.7521801001.93059205.15616.5221811025.23069333.45717.3241821048.93079463.15818.15918310733089594.25919.0281841097.53099726.76019.9321851122.53109860.56120.8731861147.93119995.86221.8511871173.8312101336322.8681881200.1313102716423.9251891226.1314104106525.0221901254.2315105516626.163

9、1911281.9316106946727.3471921310.1317108386828.5761931338.8318109846929.8521941368.0319111317031.1761951397.6320112797132.5491961427.8321114297233.9721971458.5322115817335.4481981489.7323117347436.9781991521.4324118897538.5632001553.6325120467640.2052011568.4326122047741.9052021619.7327123647843.665

10、2031653.6328125257945.4872041688.0329126888047.3732051722.9330128528149.3242061758.4331130198251.3422071794.5332131878353.4282081831.1333133578455.5852091868.4334135288557.8152101906.2335137018660.1192111944.6336138768762.4992121983.6337140538864.9582132023.2338142328967.4962142063.4339144129070.117

11、2152104.2340145949172.8232162145.7341147789275.6142172187.8342149649378.4942182230.5343151529481.4652192273.8344153429584.5292202317.8345155339687.6882212362.5346157279790.9452222407.8347159229894.3012232453.8348161209997.7592242500.534916320100101.322252547.935016521101104.992262595.935116825102108

12、.772272644.635216932103112.662282694.135317138104116.672292744.235417348105120.792302795.13551乃61106125.032312846.7356177乃107129.392322899.035717992108133.882332952.135818211c.109138.502343005.935918432110143.242353060.4360186551111148.122363115.736118881112153.132373171.836219110113158.292383288.636319340114163.582393286.336419574115169.022403344.736519809116174.612413403.936620048117180.342423463.936720289118186.232433524.736820533119192.282443586.336920780120198.482453648.837021030121204.85246371