Table 3. Selected Physicochemical Properties of Liquid Water^a.

property	value
density	997.047013 kg m–3
molar volume	18.0685 cm3 mol−1
molar concentration	55.345 mol dm–3
molality	55.508472 mol kg–1
dielectric constant	78.375
magnetic susceptibility	–1.64 × 10–10 m3 mol–1
electric conductivity	0.05501 × 10–6 Ω–1 cm–1
limiting molar conductivity	H+: 349.19 cm2 Ω–1 mol–1
	OH–: 199.24 cm2 Ω–1 mol–1
ionic mobility	H+: 3.623 × 10–7 m2 V–1 s–1
	OH–: 2.064 × 10–7 m2 V–1 s–1
thermal conductivity	0.610 W m–1 K–1
speed of sound	1496.69922 m s–1
refractive index	1.33286 (λ = 589.26 nm)
pH	6.9976
pKw	13.995
surface tension	0.07198 N m–1
kinematic viscosity	0.8935 × 10–6 m2 s–1
dynamic viscosity	0.8909 mPa s
bulk viscosity	2.47 mPa s
diffusion coefficient	0.2299 Å2 ps–1
dipole moment	2.95 D (at 27 °C)
adiabatic compressibility	0.4477 GPa–1
isothermal compressibility	0.4599 GPa–1
expansion coefficient	0.000253 °C–1
adiabatic elasticity	2.44 GPa
Joule–Thomson coefficient	0.214 K MPa–1
vapor pressure	3.165 kPa
cryoscopic constant	1.8597 K kg mol–1
ebullioscopic constant	0.5129 K kg mol–1
polarizability	1.636 × 10–40 F m2

^aQuantities dependent on temperature and/or pressure are given at 25 °C and 101.325 kPa. See also Table 1. (Data collected from ref (37).)