饱和蒸气压 （saturated vapor pressure）
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。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2227.74Pa。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。
水在不同温度下的饱和蒸气压
Saturated Water Vapor Pressures at Different Temperatures
| 温度(Temperature) | 饱和蒸气压(Saturated water vapor pressure) | 温度(Temperature) | 饱和蒸气压(Saturated water vapor pressure) | 温度(Temperature) | 饱和蒸气压(Saturated water vapor pressure) |
| t/℃ | /(×10^3Pa) | t/℃ | /(×10^3Pa) | t/℃ | /(×10^3Pa) |
| 0 | 0.61129 | 125 | 232.01 | 250 | 3973.6 |
| 1 | 0.65716 | 126 | 239.24 | 251 | 4041.2 |
| 2 | 0.70605 | 127 | 246.66 | 252 | 4109.6 |
| 3 | 0.75813 | 128 | 254.25 | 253 | 4178.9 |
| 4 | 0.81359 | 129 | 262.04 | 254 | 4249.1 |
| 5 | 0.8726 | 130 | 270.02 | 255 | 4320.2 |
| 6 | 0.93537 | 131 | 278.2 | 256 | 4392.2 |
| 7 | 1.0021 | 132 | 286.57 | 257 | 4465.1 |
| 8 | 1.073 | 133 | 295.15 | 258 | 4539 |
| 9 | 1.1482 | 134 | 303.93 | 259 | 4613.7 |
| 10 | 1.2281 | 135 | 312.93 | 260 | 46.4 |
| 11 | 1.3129 | 136 | 322.14 | 261 | 4766.1 |
| 12 | 1.4027 | 137 | 331.57 | 262 | 4843.7 |
| 13 | 1.4979 | 138 | 341.22 | 263 | 4922.3 |
| 14 | 1.5988 | 139 | 351.09 | 2 | 5001.8 |
| 15 | 1.7056 | 140 | 361.19 | 265 | 5082.3 |
| 16 | 1.8185 | 141 | 371.53 | 266 | 5163.8 |
| 17 | 1.938 | 142 | 382.11 | 267 | 5246.3 |
| 18 | 2.04 | 143 | 392.92 | 268 | 5329.8 |
| 19 | 2.1978 | 144 | 403.98 | 269 | 5414.3 |
| 20 | 2.3388 | 145 | 415.29 | 270 | 5499.9 |
| 21 | 2.4877 | 146 | 426.85 | 271 | 5586.4 |
| 22 | 2.47 | 147 | 438.67 | 272 | 5674 |
| 23 | 2.8104 | 148 | 450.75 | 273 | 5762.7 |
| 24 | 2.985 | 149 | 463.1 | 274 | 5852.4 |
| 25 | 3.169 | 150 | 475.72 | 275 | 5943.1 |
| 26 | 3.3629 | 151 | 488.61 | 276 | 6035 |
| 27 | 3.567 | 152 | 501.78 | 277 | 6127.9 |
| 28 | 3.7818 | 153 | 515.23 | 278 | 6221.9 |
| 29 | 4.0078 | 154 | 528.96 | 279 | 6317.2 |
| 30 | 4.2455 | 155 | 542.99 | 280 | 13.2 |
| 31 | 4.4953 | 156 | 557.32 | 281 | 6510.5 |
| 32 | 4.7578 | 157 | 571.94 | 282 | 6608.9 |
| 33 | 5.0335 | 158 | 586.87 | 283 | 6708.5 |
| 34 | 5.3229 | 159 | 602.11 | 284 | 6809.2 |
| 35 | 5.6267 | 160 | 617.66 | 285 | 6911.1 |
| 36 | 5.9453 | 161 | 633.53 | 286 | 7014.1 |
| 37 | 6.2795 | 162 | 9.73 | 287 | 7118.3 |
| 38 | 6.6298 | 163 | 666.25 | 288 | 7223.7 |
| 39 | 6.9969 | 1 | 683.1 | 2 | 7330.2 |
| 40 | 7.3814 | 165 | 700.29 | 290 | 7438 |
| 41 | 7.784 | 166 | 717.83 | 291 | 7547 |
| 42 | 8.2054 | 167 | 735.7 | 292 | 7657.2 |
| 43 | 8.63 | 168 | 753.94 | 293 | 7768.6 |
| 44 | 9.1075 | 169 | 772.52 | 294 | 7881.3 |
| 45 | 9.58 | 170 | 791.47 | 295 | 7995.2 |
| 46 | 10.094 | 171 | 810.78 | 296 | 8110.3 |
| 47 | 10.62 | 172 | 830.47 | 297 | 8226.8 |
| 48 | 11.171 | 173 | 850.53 | 298 | 8344.5 |
| 49 | 11.745 | 174 | 870.98 | 299 | 8463.5 |
| 50 | 12.344 | 175 | 1.8 | 300 | 8583.8 |
| 51 | 12.97 | 176 | 913.03 | 301 | 8705.4 |
| 52 | 13.623 | 177 | 934. | 302 | 8828.3 |
| 53 | 14.303 | 178 | 956.66 | 303 | 52.6 |
| 54 | 15.012 | 179 | 979.09 | 304 | 9078.2 |
| 55 | 15.752 | 180 | 1001.9 | 305 | 9205.1 |
| 56 | 16.522 | 181 | 1025.2 | 306 | 9333.4 |
| 57 | 17.324 | 182 | 1048.9 | 307 | 9463.1 |
| 58 | 18.159 | 183 | 1073 | 308 | 9594.2 |
| 59 | 19.028 | 184 | 1097.5 | 309 | 9726.7 |
| 60 | 19.932 | 185 | 1122.5 | 310 | 9860.5 |
| 61 | 20.873 | 186 | 1147.9 | 311 | 9995.8 |
| 62 | 21.851 | 187 | 1173.8 | 312 | 10133 |
| 63 | 22.868 | 188 | 1200.1 | 313 | 10271 |
| 23.925 | 1 | 1226.1 | 314 | 10410 | |
| 65 | 25.022 | 190 | 1254.2 | 315 | 10551 |
| 66 | 26.163 | 191 | 1281.9 | 316 | 10694 |
| 67 | 27.347 | 192 | 1310.1 | 317 | 10838 |
| 68 | 28.576 | 193 | 1338.8 | 318 | 10984 |
| 69 | 29.852 | 194 | 1368 | 319 | 11131 |
| 70 | 31.176 | 195 | 1397.6 | 320 | 11279 |
| 71 | 32.549 | 196 | 1427.8 | 321 | 11429 |
| 72 | 33.972 | 197 | 1458.5 | 322 | 11581 |
| 73 | 35.448 | 198 | 14.7 | 323 | 11734 |
| 74 | 36.978 | 199 | 1521.4 | 324 | 118 |
| 75 | 38.563 | 200 | 1553.6 | 325 | 12046 |
| 76 | 40.205 | 201 | 1568.4 | 326 | 12204 |
| 77 | 41.905 | 202 | 1619.7 | 327 | 123 |
| 78 | 43.665 | 203 | 1653.6 | 328 | 12525 |
| 79 | 45.487 | 204 | 1688 | 329 | 12688 |
| 80 | 47.373 | 205 | 1722.9 | 330 | 12852 |
| 81 | 49.324 | 206 | 1758.4 | 331 | 13019 |
| 82 | 51.342 | 207 | 1794.5 | 332 | 13187 |
| 83 | 53.428 | 208 | 1831.1 | 333 | 13357 |
| 84 | 55.585 | 209 | 1868.4 | 334 | 13528 |
| 85 | 57.815 | 210 | 1906.2 | 335 | 13701 |
| 86 | 60.119 | 211 | 1944.6 | 336 | 13876 |
| 87 | 62.499 | 212 | 1983.6 | 337 | 14053 |
| 88 | .958 | 213 | 2023.2 | 338 | 14232 |
| 67.496 | 214 | 2063.4 | 339 | 14412 | |
| 90 | 70.117 | 215 | 2104.2 | 340 | 14594 |
| 91 | 72.823 | 216 | 2145.7 | 341 | 14778 |
| 92 | 75.614 | 217 | 2187.8 | 342 | 149 |
| 93 | 78.494 | 218 | 2230.5 | 343 | 15152 |
| 94 | 81.465 | 219 | 2273.8 | 344 | 15342 |
| 95 | 84.529 | 220 | 2317.8 | 345 | 15533 |
| 96 | 87.688 | 221 | 2362.5 | 346 | 15727 |
| 97 | 90.945 | 222 | 2407.8 | 347 | 15922 |
| 98 | 94.301 | 223 | 2453.8 | 348 | 16120 |
| 99 | 97.759 | 224 | 2500.5 | 349 | 16320 |
| 100 | 101.32 | 225 | 2547.9 | 350 | 16521 |
| 101 | 104.99 | 226 | 2595.9 | 351 | 16825 |
| 102 | 108.77 | 227 | 24.6 | 352 | 16932 |
| 103 | 112.66 | 228 | 2694.1 | 353 | 17138 |
| 104 | 116.67 | 229 | 2744.2 | 354 | 17348 |
| 105 | 120.79 | 230 | 2795.1 | 355 | 17561 |
| 106 | 125.03 | 231 | 2846.7 | 356 | 17775 |
| 107 | 129.39 | 232 | 29 | 357 | 17992 |
| 108 | 133.88 | 233 | 2952.1 | 358 | 18211 |
| 109 | 138.5 | 234 | 3005.9 | 359 | 18432 |
| 110 | 143.24 | 235 | 3060.4 | 360 | 18655 |
| 111 | 148.12 | 236 | 3115.7 | 361 | 18881 |
| 112 | 153.13 | 237 | 3171.8 | 362 | 19110 |
| 113 | 158.29 | 238 | 3288.6 | 363 | 19340 |
| 114 | 163.58 | 239 | 3286.3 | 3 | 19574 |
| 115 | 169.02 | 240 | 3344.7 | 365 | 19809 |
| 116 | 174.61 | 241 | 3403.9 | 366 | 20048 |
| 117 | 180.34 | 242 | 3463.9 | 367 | 202 |
| 118 | 186.23 | 243 | 3524.7 | 368 | 20533 |
| 119 | 192.28 | 244 | 3586.3 | 369 | 20780 |
| 120 | 198.48 | 245 | 38.8 | 370 | 21030 |
| 121 | 204.85 | 246 | 3712.1 | 371 | 21286 |
| 122 | 211.38 | 247 | 3776.2 | 372 | 21539 |
| 123 | 218.09 | 248 | 3841.2 | 373 | 21803 |
| 124 | 224.96 | 249 | 3907 | - | - |
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