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# Water - Properties at Gas-Liquid Equilibrium Conditions

Water tends to evaporate or vaporize by projecting molecules into the space above its surface. If the space is confined the partial pressure exerted by the molecules increases until the rate at which molecules reenter the liquid is equal to the rate at which they leave. The vapor pressure of water is the pressure at which water vapor is in thermodynamic equilibrium with its condensed state . At higher pressures water would condense. At this equilibrium condition the vapor pressure is the saturation pressure .

The figures and tables below summarize the thermophysical properties of water and steam at equilibrium. The figures show liquid and gaseous states at equilibrium as a function of temperature, starting at the triple point and ending at the critical temperature.
Tabulated values are given below the figures, in SI and Imperial units.

See Water and Heavy Water for thermodynamic properties at standard condtions.
See also these and other properties of Water at varying temperature and pressure : Boiling points at high pressure , Boiling points at vacuum pressure , Density and specific weight , Dynamic and kinematic viscosity , Enthalpy and entropy , Heat of vaporization , Ionization Constant, pK w , of normal and heavy water , Melting points at high pressure , Prandtl number , Properties at Gas-Liquid Equilibrium Conditions , Saturation pressure , Specific gravity , Specific heat (heat capacity) , Specific volume , Thermal conductivity , Thermal diffusivity and Vapour pressure at gas-liquid equilibrium .

Vapor pressure of water as function of temperature (°C and °F):

.

See Water - Saturation pressure for calculator of equilibrium pressure at varying temperature.

Dynamic viscosity of water (liquid and vapor) as function of temperature (°C and °F):

.

See Water - Dynamic and Kinematic Viscosity for calculator and variations at constant pressures.

Density of water (liquid and vapor) as function of temperature (°C and °F):

.

See Water - Density, Specific Weight and Thermal Expantion Coefficient for calculator and variations at constant pressures.

Specific heat (heat capacity) of water (liquid and vapor) as function of temperature (°C and °F):

.

See Water - Specific heat (heat capacity) for calculator of heat capacity at given temperatures .

Thermal conductivity of water (liquid and vapor) as function of temperature (°C and °F):

See Water - Thermal Conductivity for variations at constant pressures.

Prandtl number of water (liquid and vapor) as function of temperature (°C and °F):

See Water - Prandtl Number for variations at constant pressures.

Thermal diffusivity of water (liquid and vapor) as function of temperature (°C and °F):

See Water - Thermal Diffusivity for variations at constant pressures.

Specific entropy of water (liquid and vapor) as function of temperature (°C and °F):

See Water - Enthalpy and Entropy for tabulated values in different units.

Enthalpy of water (liquid and vapor) as function of temperature (°C and °F):

See Water - Enthalpy and Entropy for tabulated values in different units.

Tabulated values for water properties at gas-liquid equilibrium pressure, given in SI units:

For full table with Thermal Conductivity, Dynamic Viscosity, Enthalpy, Specific Entropy, Prandtl Number and Thermal Diffusivity - rotate the screen!

 State Temperature Pressure Density Heat Capacity CV Heat Capacity CP CP /CV Thermal Conductivity Dynamic Viscosity Enthalpy Specific Entropy Prandtl Number Thermal Diffusivity [K] [°C] [bara] [g/l], [kg/m3 ] [kJ/kg K] [kJ/kg K] [-] [mW/m K] [μPa s] [kJ/kg] [kJ/(kg K)] [-] [x10-6 m2/s] Liquid 273.16 0.01 6.1E-03 999.8 4.217 4.231 1.003 561.4 1791 6.11E-04 0 13.50 0.1327 280 6.9 0.0099 999.9 4.200 4.201 1.000 574.0 1434 28.80 0.1041 10.49 0.1367 300 26.9 0.0354 996.5 4.130 4.181 1.012 610.3 853.8 112.6 0.3931 5.849 0.1465 320 46.9 0.105 989.4 4.042 4.181 1.034 639.7 577.0 196.2 0.6628 3.771 0.1547 340 66.9 0.272 979.5 3.942 4.188 1.063 660.6 422.0 279.9 0.9165 2.676 0.1610 360 86.9 0.622 967.4 3.837 4.202 1.095 673.8 326.1 363.8 1.156 2.034 0.1657 380 107 1.29 953.3 3.733 4.224 1.132 681.0 262.7 448.1 1.384 1.629 0.1691 400 127 2.46 937.5 3.632 4.255 1.172 683.6 218.6 533.0 1.601 1.361 0.1714 420 147 4.37 919.9 3.538 4.299 1.215 682.5 186.7 618.6 1.810 1.176 0.1726 440 167 7.34 900.7 3.449 4.357 1.263 678.1 162.8 704.5 2.011 1.046 0.1728 460 187 11.7 879.6 3.368 4.433 1.316 670.3 144.3 793.4 2.205 0.955 0.1719 480 207 17.9 856.5 3.293 4.533 1.376 659.1 129.6 883.3 2.395 0.892 0.1697 500 227 26.4 831.3 3.226 4.663 1.446 644.1 117.7 975.4 2.581 0.852 0.1661 530 257 44.6 788.5 3.138 4.947 1.576 613.2 103.1 1119 2.856 0.831 0.1572 560 287 71.1 737.8 3.072 5.424 1.765 570.2 90.86 1273 3.132 0.864 0.1425 590 317 108 674.8 3.042 6.378 2.097 515.4 79.60 1443 3.418 0.985 0.1198 620 347 159 586.9 3.114 9.354 3.004 454.1 67.38 1646 3.740 1.388 0.08272 630 357 180 544.2 3.228 12.8269 3.974 432.5 62.24 1731 3.870 1.846 0.06196 640 367 203 481.5 3.581 25.9424 7.244 414.9 55.25 1842 4.038 3.454 0.03322 647.1 373.95 221 322.0 2084 4.407 Gas 273.16 0.01 6.1E-03 0.00485 1.418 1.884 1.328 17.07 9.216 2501 9.156 1.017 1869 280 6.9 0.0099 0.00767 1.424 1.891 1.328 17.44 9.382 2513 8.978 1.017 1202 300 26.9 0.0354 0.02558 1.442 1.914 1.327 18.67 9.920 2550 8.517 1.017 381.3 320 46.9 0.105 0.07166 1.463 1.942 1.328 20.12 10.52 2586 8.130 1.015 144.6 340 66.9 0.272 0.1744 1.489 1.979 1.329 21.78 11.16 2621 7.801 1.014 63.11 360 86.9 0.622 0.3786 1.525 2.033 1.333 23.70 11.82 2654 7.519 1.014 30.79 380 107 1.29 0.7483 1.575 2.110 1.339 25.88 12.50 2686 7.274 1.019 16.39 400 127 2.46 1.369 1.643 2.218 1.350 28.35 13.19 2716 7.058 1.032 9.332 420 147 4.37 2.352 1.734 2.367 1.365 31.13 13.88 2742 6.866 1.055 5.593 440 167 7.34 3.833 1.845 2.560 1.388 34.23 14.57 2765 6.691 1.090 3.489 460 187 11.7 5.983 1.974 2.801 1.419 37.66 15.26 2783 6.530 1.135 2.247 480 207 17.9 9.014 2.117 3.098 1.463 41.46 15.95 2796 6.380 1.192 1.485 500 227 26.4 13.20 2.271 3.463 1.525 45.67 16.65 2802 6.235 1.263 0.9991 530 257 44.6 22.47 2.527 4.209 1.666 53.13 17.76 2798 6.024 1.407 0.5618 560 287 71.1 37.15 2.822 5.410 1.917 63.34 19.01 2771 5.807 1.623 0.3152 590 317 108 61.24 3.184 7.768 2.440 81.11 20.63 2710 5.565 1.976 0.1705 620 347 159 106.3 3.674 14.94 4.067 126.7 23.37 2584 5.253 2.758 0.07973 630 357 180 132.8 3.911 22.66 5.793 163.4 25.02 2511 5.108 3.468 0.05430 640 367 203 177.1 4.306 52.59 12.21 250.0 27.94 2396 4.903 5.876 0.02684 647.1 373.95 221 322.0 2084 4.306

Tabulated values for water properties at gas-liquid equilibrium pressure, given in Imperial units:

For full table with Thermal Conductivity, Dynamic Viscosity, Enthalpy, Specific Entropy, Prandtl Number and Thermal Diffusivity -- rotate the screen!

 State Temperature Pressure Density Heat Capacity CV Heat Capacity CP CP /CV Thermal Conductivity Dynamic Viscosity Enthalpy Specific Entropy Prandtl Number Thermal Diffusivity [K] [°F] [psia] [lb/ft3 ] [Btu(IT)/lb °F] [Btu(IT)/lb °F] [-] [Btu(IT)/h ft °F] [x10-6 lbf s/ft2] [x10-6 lbm s/ft s] [Btu(IT)/lb] [Btu(IT)/(lb °F)] [-] [x10 -5 ft2/s] Liquid 273.16 32.018 0.0888 62.42 1.007 1.011 1.003 0.3244 37.41 1204 2.63E-04 0 13.50 0.1428 280 44.3 0.144 62.42 1.003 1.003 1.000 0.3317 29.94 963.4 12.38 0.02487 10.49 0.1471 300 80.3 0.513 62.21 0.9865 0.9986 1.012 0.3526 17.83 573.8 48.39 0.09389 5.849 0.1577 320 116 1.53 61.77 0.9653 0.9985 1.034 0.3696 12.05 387.7 84.34 0.1583 3.771 0.1665 340 152 3.94 61.15 0.9414 1.000 1.063 0.3817 8.813 283.6 120.3 0.2189 2.676 0.1733 360 188 9.02 60.39 0.9164 1.004 1.095 0.3893 6.811 219.1 156.4 0.2762 2.034 0.1784 380 224 18.7 59.51 0.8916 1.009 1.132 0.3935 5.486 176.5 192.6 0.3306 1.629 0.1820 400 260 35.6 58.52 0.8676 1.016 1.172 0.3950 4.566 146.9 229.1 0.3825 1.361 0.1845 420 296 63.4 57.43 0.8449 1.027 1.215 0.3944 3.899 125.4 265.9 0.4322 1.176 0.1858 440 332 106 56.23 0.8238 1.041 1.263 0.3918 3.400 109.4 302.9 0.4802 1.046 0.1860 460 368 170 54.91 0.8044 1.059 1.316 0.3873 3.014 96.97 341.1 0.5267 0.955 0.1850 480 404 260 53.47 0.7866 1.083 1.376 0.3808 2.708 87.11 379.8 0.5721 0.892 0.1827 500 440 383 51.90 0.7704 1.114 1.446 0.3721 2.457 79.06 419.4 0.6165 0.852 0.1788 530 494 646 49.23 0.7495 1.182 1.576 0.3543 2.152 69.25 481.2 0.6822 0.831 0.1692 560 548 1031 46.06 0.7338 1.295 1.765 0.3295 1.898 61.05 547.3 0.7481 0.864 0.1534 590 602 1569 42.13 0.7266 1.523 2.097 0.2978 1.662 53.49 620.4 0.8164 0.985 0.1289 620 656 2306 36.64 0.7438 2.234 3.004 0.2624 1.407 45.28 707.5 0.8932 1.388 0.08903 630 674 2606 33.98 0.7710 3.064 3.974 0.2499 1.300 41.83 744.1 0.9243 1.846 0.06669 640 692 2939 30.06 0.8554 6.196 7.244 0.2397 1.154 37.12 791.8 0.9644 3.454 0.03575 647.1 705.11 3200 20.10 896.1 1.053 Gas 273.16 32.018 0.0888 3.03E-04 0.3388 0.4501 1.328 0.00986 0.1925 6.193 1075 2.187 1.017 2012 280 44.3 0.144 4.79E-04 0.3402 0.4517 1.328 0.01008 0.1959 6.304 1081 2.144 1.017 1293 300 80.3 0.513 0.00160 0.3445 0.4572 1.327 0.01079 0.2072 6.666 1096 2.034 1.017 410.5 320 116 1.53 0.00447 0.3493 0.4638 1.328 0.01162 0.2197 7.068 1112 1.942 1.015 155.6 340 152 3.94 0.01089 0.3556 0.4727 1.329 0.01259 0.2330 7.497 1127 1.863 1.014 67.93 360 188 9.02 0.02363 0.3642 0.4855 1.333 0.01369 0.2469 7.945 1141 1.796 1.014 33.15 380 224 18.7 0.04671 0.3762 0.5039 1.339 0.01495 0.2612 8.402 1155 1.737 1.019 17.64 400 260 35.6 0.08549 0.3925 0.5298 1.350 0.01638 0.2755 8.865 1168 1.686 1.032 10.04 420 296 63.4 0.1468 0.4140 0.5652 1.365 0.01799 0.2900 9.329 1179 1.640 1.055 6.020 440 332 106 0.2393 0.4406 0.6114 1.388 0.01978 0.3044 9.793 1189 1.598 1.090 3.755 460 368 170 0.3735 0.4715 0.6691 1.419 0.02176 0.3187 10.25 1196 1.560 1.135 2.419 480 404 260 0.5627 0.5056 0.7399 1.463 0.02395 0.3332 10.72 1202 1.524 1.192 1.598 500 440 383 0.8240 0.5425 0.8271 1.525 0.02639 0.3478 11.19 1205 1.489 1.263 1.075 530 494 646 1.403 0.6035 1.005 1.666 0.03070 0.3708 11.93 1203 1.439 1.407 0.6047 560 548 1031 2.319 0.6741 1.292 1.917 0.03660 0.3970 12.77 1191 1.387 1.623 0.3393 590 602 1569 3.823 0.7605 1.855 2.440 0.04686 0.4310 13.87 1165 1.329 1.976 0.1835 620 656 2306 6.636 0.8776 3.569 4.067 0.07318 0.4882 15.71 1111 1.255 2.758 0.08582 630 674 2606 8.293 0.9342 5.412 5.793 0.09443 0.5225 16.81 1080 1.220 3.468 0.05845 640 692 2939 11.06 1.028 12.56 12.21 0.1445 0.5835 18.77 1030 1.171 5.876 0.02889 647.1 705.11 3200 20.10 896.1 1.029

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