Water, H 2 O

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Water, H₂O
Categories:	Fluid
Material Notes:
Key Words:	H2O
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Physical Properties	Original Value	Comments

Density	0.95838 g/cc @Temperature 100 °C
	0.99823 g/cc @Temperature 20.0 °C
	0.99987 g/cc @Temperature 0.000 °C
	1.00000 g/cc @Temperature 3.98 °C	density = 1.00000 g/cc at 3.98°C (most dense temperature)
pH	7.0
Viscosity	0.2818 cP @Pressure 0.100 MPa, Temperature 100 °C
	0.3145 cP @Pressure 0.100 MPa, Temperature 90.0 °C
	0.3544 cP @Pressure 0.100 MPa, Temperature 80.0 °C
	0.404 cP @Pressure 0.100 MPa, Temperature 70.0 °C
	0.4665 cP @Pressure 0.100 MPa, Temperature 60.0 °C
	0.547 cP @Pressure 0.100 MPa, Temperature 50.0 °C
	0.6532 cP @Pressure 0.100 MPa, Temperature 40.0 °C
	0.7977 cP @Pressure 0.100 MPa, Temperature 30.0 °C
	1.002 cP @Pressure 0.100 MPa, Temperature 20.0 °C
	1.307 cP @Pressure 0.100 MPa, Temperature 10.0 °C
	1.793 cP @Pressure 0.100 MPa, Temperature 0.000 °C
Molecular Weight	18.015 g/mol
Vapor Pressure	0.006113 bar @Temperature 0.000 °C
	0.012281 bar @Temperature 10.0 °C
	0.023388 bar @Temperature 20.0 °C
	0.042455 bar @Temperature 30.0 °C
	0.073814 bar @Temperature 40.0 °C
	0.12344 bar @Temperature 50.0 °C
	0.19932 bar @Temperature 60.0 °C
	0.31176 bar @Temperature 70.0 °C
	0.47373 bar @Temperature 80.0 °C
	0.70117 bar @Temperature 90.0 °C
	1.01325 bar @Temperature 100 °C
	17.351 torr @Temperature 20.0 °C
Surface Tension	58.91 dynes/cm @Pressure 0.100 MPa, Temperature 100 °C
	60.82 dynes/cm @Pressure 0.100 MPa, Temperature 90.0 °C
	62.67 dynes/cm @Pressure 0.100 MPa, Temperature 80.0 °C
	64.47 dynes/cm @Pressure 0.100 MPa, Temperature 70.0 °C
	66.24 dynes/cm @Pressure 0.100 MPa, Temperature 60.0 °C
	67.94 dynes/cm @Pressure 0.100 MPa, Temperature 50.0 °C
	69.6 dynes/cm @Pressure 0.100 MPa, Temperature 40.0 °C
	71.2 dynes/cm @Pressure 0.100 MPa, Temperature 30.0 °C
	72.75 dynes/cm @Pressure 0.100 MPa, Temperature 20.0 °C
	74.23 dynes/cm @Pressure 0.100 MPa, Temperature 10.0 °C
	75.64 dynes/cm @Pressure 0.100 MPa, Temperature 0.000 °C

Chemical Properties	Original Value	Comments
Critical Pressure	217.6 atm
Critical Temperature	374.1 °C
Critical Density	0.322 g/cc
Critical Molar Volume	56.0 cm³/mol

Electrical Properties	Original Value	Comments
Electrical Resistivity	1.818e+7 ohm-cm
Dielectric Constant	55.51 @Pressure 0.100 MPa, Temperature 100 °C
	58.12 @Pressure 0.100 MPa, Temperature 90.0 °C
	60.86 @Pressure 0.100 MPa, Temperature 80.0 °C
	63.73 @Pressure 0.100 MPa, Temperature 70.0 °C
	66.73 @Pressure 0.100 MPa, Temperature 60.0 °C
	69.88 @Pressure 0.100 MPa, Temperature 50.0 °C
	73.17 @Pressure 0.100 MPa, Temperature 40.0 °C
	76.6 @Pressure 0.100 MPa, Temperature 30.0 °C
	80.2 @Pressure 0.100 MPa, Temperature 20.0 °C
	83.96 @Pressure 0.100 MPa, Temperature 10.0 °C
	87.9 @Pressure 0.100 MPa, Temperature 0.000 °C

Thermal Properties	Original Value	Comments
Heat of Fusion	333.5 J/g
Heat of Vaporization	539.6 cal/g
	2257 J/g
CTE, linear	-23.0 µm/m-°C @Temperature 0.000 °C
	29.3 µm/m-°C @Temperature 10.0 °C
	69.0 µm/m-°C @Temperature 20.0 °C
	153 µm/m-°C @Temperature 50.0 °C
	250 µm/m-°C @Temperature 100 °C
Specific Heat Capacity	1.867 J/g-°C @Temperature 25.0 °C	Vapor
	4.178 J/g-°C @Pressure 0.100 MPa, Temperature 30.0 °C	C_P
	4.179 J/g-°C @Pressure 0.100 MPa, Temperature 40.0 °C	C_P
	4.181 J/g-°C @Pressure 0.100 MPa, Temperature 50.0 °C	C_P
	4.182 J/g-°C @Pressure 0.100 MPa, Temperature 20.0 °C	C_P
	4.184 J/g-°C @Pressure 0.100 MPa, Temperature 60.0 °C	C_P
	4.189 J/g-°C @Pressure 0.100 MPa, Temperature 70.0 °C	C_P
	4.192 J/g-°C @Pressure 0.100 MPa, Temperature 10.0 °C	C_P
	4.196 J/g-°C @Pressure 0.100 MPa, Temperature 80.0 °C	C_P
	4.205 J/g-°C @Pressure 0.100 MPa, Temperature 90.0 °C	C_P
	4.216 J/g-°C @Pressure 0.100 MPa, Temperature 100 °C	C_P
	4.218 J/g-°C @Pressure 0.100 MPa, Temperature 0.000 °C	C_P
Thermal Conductivity	0.0187 W/m-K @Temperature 26.9 °C	gas at saturation vapor pressure
	0.1317 W/m-K @Temperature -73.1 °C	gas at saturation vapor pressure
	0.0271 W/m-K @Pressure 0.100 MPa, Temperature 127 °C	gas
	0.0357 W/m-K @Pressure 0.100 MPa, Temperature 227 °C	gas
	0.0471 W/m-K @Pressure 0.100 MPa, Temperature 327 °C	gas
	0.561 W/m-K @Pressure 0.100 MPa, Temperature 0.000 °C	liquid
	0.580 W/m-K @Pressure 0.100 MPa, Temperature 10.0 °C	liquid
	0.5984 W/m-K @Pressure 0.100 MPa, Temperature 20.0 °C	liquid
	0.6154 W/m-K @Pressure 0.100 MPa, Temperature 30.0 °C	liquid
	0.6305 W/m-K @Pressure 0.100 MPa, Temperature 40.0 °C	liquid
	0.6435 W/m-K @Pressure 0.100 MPa, Temperature 50.0 °C	liquid
	0.6543 W/m-K @Pressure 0.100 MPa, Temperature 60.0 °C	liquid
	0.6631 W/m-K @Pressure 0.100 MPa, Temperature 70.0 °C	liquid
	0.670 W/m-K @Pressure 0.100 MPa, Temperature 80.0 °C	liquid
	0.6753 W/m-K @Pressure 0.100 MPa, Temperature 90.0 °C	liquid
	0.6791 W/m-K @Pressure 0.100 MPa, Temperature 100 °C	liquid
Melting Point	0.000 °C
Boiling Point	100 °C

Optical Properties	Original Value	Comments
Refractive Index	1.31783 @Temperature 100 °C, Wavelength 589.3 nm	Sodium light
	1.33299 @Temperature 20.0 °C, Wavelength 589.3 nm	Sodium light

Descriptive Properties
Antoine's Vapor Pressure A Parameter	18.3036
Antoine's Vapor Pressure B Parameter	3816.44
Antoine's Vapor Pressure C Parameter	-46.13
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)	P in mmHg and T in K
CAS registry number (CARN)	7732-18-5
Chemical Formula	H₂O
Critical Compressibility (Zc)	0.229
Dipole moment (p/C.m)	6.004E-28
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	658.25
Dynamic Viscosity Parameter B	283.16
Molar Heat Capacity (298K)	33.637 J/mol-K
Molar Heat Capacity of Vapor a Parameter	32.221
Molar Heat Capacity of Vapor b Parameter	0.0019
Molar Heat Capacity of Vapor c Parameter	1.055E-05
Molar Heat Capacity of Vapor d Parameter	-3.594E-09
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³	C_p in J/mol-K
UV cut-off (nm)	191

References for this datasheet.

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