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Extended data list for water

Water Properties (abbreviated list)


List of physical data concerning liquid H2O *

Property

Data

Area, surface covered

19.0 Å2 ˣ mol−1 (monolayer [795])

Atmospheric content

19.66 g ˣ kg−1 (relative humidity = 100)

Boiling point

100.0 °C, 373.1243 K see [88]

Compressibility, adiabatic S)

0.4477 GPa−1 [620]

Compressibility, isothermalT)

0.4599 GPa−1 [507]

Conductivity, electrolytic

0.055 01 μS ˣ cm−1 [737])

Conductivity, thermal

0.610 W ˣ m−1 ˣ K−1[IAPWS]

Critical point

647.096 K, 22.064 MPa, 322 kg ˣ m−3 (IAPWS)

Cryoscopic constant  

1.8597 K ˣ kg ˣ mol−1

Density

997.05 kg ˣ m−3  [67, 112]

Dielectric constant  

78.4 [63]

Diffusion coefficient

0.2299 Å2 ˣ ps−1 [1933]

Dipole moment, μ

2.95±0.2 D (liquid, 27 °C) [129]

Ebullioscopic constant  

0.5129 K ˣ kg ˣ mol−1

Enthalpy of vaporization  

40.657 kJ ˣ mol−1 (100 °C) [61]

Enthalpy of fusion

6.00678 kJ ˣ mol−1 (0 °C) [1385]

Expansion coefficient (α)

0.000253 °C−1 [68]

Magnetic susceptibility

-1.64 ˣ 10−10 m3 ˣ mol−1 [670 ]

Melting point

0.00 °C, 273.152 519 K (IAPWS)

Molality

55.508 472 mol ˣ kg −1

Molar concentration

55.345 mol ˣ L−1

Molar mass

18.015 268 g ˣ mol−1

pH

6.9996 (based on [112])

pKa

13.995 (25 °C) [2965]

pKw

13.9991 [112]

Refractive index

1.332 86 (λ = 589.26 nm) [310

Resistance, electrical

18.18 MΩ cm [737]

Specific heat capacity, CP

75.338 J ˣ mol−1 ˣ K−1 calculated from [1154 ]

Specific heat capacity, Cv

74.539 J ˣ mol−1 ˣ K−1 [67]

Speed of sound

1496.7 m ˣ s−1 [620]

0.07198 J ˣ m−2 [IAPWS]

Triple point

0.01 °C, 611.657 Pa, 0.99978 g ˣ cm−3 [536]

Vapor pressure

3.165 kPa [808]

Viscosity, dynamic

0.8909 mPa s [IAPWS]

Viscosity, kinematic

0.8935 ˣ 10−6 m2 ˣ s−1

Volume, molar

18.0685 cm3 [1006]

* All the data is for liquid water at 25 °C, 101.325 kPa, unless other conditions clearly apply. For more details, go to the extended list.

 

 

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This page was established in 2008 and last updated by Martin Chaplin on 31 October, 2021


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