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Water - Density Viscosity Specific Weight

Thermodynamics | Engineering Physics
Engineering Hydraulics

The following is engineering properties of water

Dynamic viscosity of water

The dynamic viscosity of water is 8.90 × 10−4 Pa·s or 8.90 × 10−3 dyn·s/cm2 or 0.890 cP at about 25 °C.

Water has a viscosity of 0.0091 poise at 25 °C, or 1 centipoise at 20 °C.

As a function of temperature T (K): (Pa·s) = A × 10B/(TC)

where A=2.414 × 10−5 Pa·s ; B = 247.8 K ; and C = 140 K.Viscosity of liquid water at different temperatures up to the normal boiling point is listed below.

 Temperature [°C] Viscosity [mPa·s] 10 1.308 20 1.002 30 0.7978 40 0.6531 50 0.5471 60 0.4658 70 0.4044 80 0.3550 90 0.3150 100 0.2822

Dynamic and Kinematic Viscosity of Water in Imperial Units (BG units):

 Temperature - t - (°F) Dynamic Viscosity - µ - (lb s/ft2) x 10-5 Kinematic Viscosity -ν - (ft2/s) x 10-5 32 3.732 1.924 40 3.228 1.664 50 2.730 1.407 60 2.344 1.210 70 2.034 1.052 80 1.791 0.926 90 1.500 0.823 100 1.423 0.738 120 1.164 0.607 140 0.974 0.511 160 0.832 0.439 180 0.721 0.383 200 0.634 0.339 212 0.589 0.317

Dynamic and Kinematic Viscosity of Water in SI Units:

 Temperature - t - (°C) Dynamic Viscosity - µ - (N s/m2) x 10-3 Kinematic Viscosity -ν - (m2/s) x 10-6 0 1.787 1.787 5 1.519 1.519 10 1.307 1.307 20 1.002 1.004 30 0.798 0.801 40 0.653 0.658 50 0.547 0.553 60 0.467 0.475 70 0.404 0.413 80 0.355 0.365 90 0.315 0.326 100 0.282 0.294
• 1 N s/m2 = 1 Pa s = 10 poise = 1,000 milliPa s
• 1 m2/s = 1 x 104 cm2/s =1 x 104 stokes = 1 x 106 centistokes

Density and Weight of Water at Known Temperature

Density and weight of water, at standard sea-level atmospheric pressure

 Temperature Density Weight °F/°C grams/cm3 pounds/ft3 kilograms/liter 32°/0° 0.99987 62.416 0.999808 39.2°/4.0° 1.00000 62.424 0.999937 40°/4.4° 0.99999 62.423 0.999921 50°/10° 0.99975 62.408 0.999681 60°/15.6° 0.99907 62.366 0.999007 70°/21° 0.99802 62.300 0.997950 80°/26.7° 0.99669 62.217 0.996621 90°/32.2° 0.99510 62.118 0.995035 100°/37.8° 0.99318 61.998 0.993112 120°/48.9° 0.98870 61.719 0.988644 140°/60° 0.98338 61.386 0.983309 160°/71.1° 0.97729 61.006 0.977223 180°/82.2° 0.97056 60.586 0.970495 200°/93.3° 0.96333 60.135 0.963270 212°/100° 0.95865 59.843 0.958593

Heat of Vaporization of Water - Experimental Data from Dortmund Data Bank

Engineering Properties of Water

 Property of Water 0° C 20° C 40° C 60° C 80° C 100° C Units Density 999.84 998.21 992.22 983.20 971.82 958.40 kg m-3 Thermal Expansion -0.07 0.207 0.385 0.523 0.643 0.752 *10-3   K-1 Isothermal Compression (Volume Viscosity) 5.0879 4.5895 4.4241 4.4507 4.6418 4.9015 *10-10   Pa-1 Dynamic Viscosity 1.793 1.002 0.6532 0.4665 0.3544 0.2818 *10-3   kg m-1 s-1  (Pa s) Kinematic Viscosity 1.787 1.004 0.658 0.475 0.365 0.294 *10-6   m2 s-1 Thermal Conductivity 561.0 598.4 630.5 654.3 670.0 679.1 *10-3   W m-1 K-1 Specific Heat at constant pressure   Cp 4.2176 4.1818 4.1785 4.1843 4.1963 4.2159 *103    J kg-1 K-1 Specific Heat at constant volume   Cv *103    J kg-1 K-1 Specific Entropy   e 0 0.296 0.581 0.832 1.076 1.307 *103    J kg-1 K-1 Specific Enthalpy 0 83.8 167.6 251.5 335.3 419.1 *103    J kg-1 Saturation Vapor Pressure 611.3 2,338.8 7,381.4 19,932 47,373 101,325 Pa Surface Tension 75.64 72.75 69.60 66.24 62.47 58.91 *10-3   N m-1 Speed of Sound 1,403 1,481 1,526 1,552 1,555 1,543 m s-1

Pure water has it's highest density at 4.0°C  = 1000 kg/m3.
Freezing/Melting temperature = 0.00°C   (101,325 Pa)
Boiling/Condensing temperature = 100.00°C   (101,325 Pa)
Latent heat of melting = 334 kJ/kg
Latent heat of evaporation = 2,270 kJ/kg
Molar mass = 18.01528 g/mol

Viscosity of Liquid Water in the range -8°C to 150°C