Liquid phase
Official name
Liquid water
Secondary names
Water; oxidane; Hydrogen oxide; Dihydrogen oxide
Type
Class
hydrogen bonded molecular liquid
Compound type
liquid
Phase type
liquid
Chemical composition
Formula
H2O
Chemical formula
H2O
Isotope mixture type
terrestrial abundance
  Formula Name Family Mole fraction State Relevance
H2O Water molecule 1.0 pure main
Chemical functions
  Function Number
R−OH 2
Chemical bonds
  Bond Number
−O−H 2
Molar mass
18.0153 g/mol
Density
0.997 (298 K) g/cm3
State NTP
liquid
Phase transitions
Phase transition type Other phases Temperature - Pressure
triple point solid-liquid-gas liquid water, gas 273.16 K (611.66Pa)
solid-liquid liquid water 273.15 K (100 kPa)
Refraction index n
1.3330
Pure color
colorless
Diaphaneity
transparent
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