Table below summarizes the available values of the density, specific heat capacity at constant pressure (Cp), vapor pressure, viscosity, thermal conductivity, dielectric constant, and surface tension for liquid water in the range 0 — 100 °C.

All values (except vapor pressure) refer to a pressure of 100 kPa (1 bar). The temperature scale is IPTS-68.

Temperature, °C Density, g/cm3 sp. heat capacity at constant pressure Cp, J/g K Vapor Pressure, kPa Viscosity, μPa s Thermal Conductivity, mW/K m Dielectric Constant Surface Tension, mN/m
0 0.99984 4.2176 0.6113 1793 561 87.9 75.64
10 0.9997 4.1921 1.2281 1307 580 83.96 74.23
20 0.99821 4.1818 2.3388 1002 598.4 80.2 72.75
30 0.99565 4.1784 4.2455 797.7 615.4 76.6 71.2
40 0.99222 4.1785 7.3814 653.2 630.5 73.17 69.6
50 0.98803 4.1806 12.344 547 643.5 69.88 67.94
60 0.9832 4.1843 19.932 466.5 654.3 66.73 66.24
70 0.97778 4.1895 31.176 404 663.1 63.73 64.47
80 0.97182 4.1963 47.373 354.4 670 60.86 62.67
90 0.96535 4.205 70.117 314.5 675.3 58.12 60.82
100 0.9584 4.2159 101.325 281.8 679.1 55.51 58.91
Ref 1-3 2 1,3 3 3 4 5