Water

E343615

Water is a fundamental chemical substance (H₂O) essential for life, known for its roles in biological processes, climate regulation, and human civilization.

All labels observed (2)

Label Occurrences
Water canonical 3
Earth hydrosphere 1

How this entity was disambiguated

Statements (67)

Predicate Object
instanceOf chemical substance
inorganic compound
molecule
oxide
polar solvent
vital resource
appearance colorless liquid
averageOceanSalinity about 35 g/kg
boilingPoint 100 °C
CASNumber 7732-18-5
chemicalFormula H2O
commonAllotropeOf hydrogen oxide
containsElement hydrogen
oxygen
covers about 71% of Earth surface
criticalPointPressure 22.064 MPa
criticalPointTemperature 374 °C
densityAt25°C 0.997 g/cm³
densityAt4°C 1 g/cm³
dielectricConstant about 80 at 20 °C
gaseousPhaseName steam
water vapor
heatOfFusion about 6.01 kJ/mol
heatOfVaporization about 40.7 kJ/mol
hydrogenBonding forms extensive hydrogen bonds
isPartOf Earth oceans
surface form: Earth hydrosphere
isResourceType freshwater
saltwater
isVitalFor animal life
human survival
plant growth
meltingPoint 0 °C
molarMass 18.01528 g/mol
odor odorless
pH approximately 7 at 25 °C
polarity polar
refractiveIndexAt20°C about 1.333
roleInBiology essential for life on Earth
involved in cellular respiration
involved in photosynthesis
major component of cells
medium for biochemical reactions
regulates body temperature in organisms
roleInClimate acts as greenhouse gas in vapor form
influences weather patterns
key component of the hydrological cycle
stores and transports heat in oceans
roleInGeology agent of erosion
participates in rock weathering
roleInHumanCivilization used for agriculture
used for drinking
used for hydroelectric power generation
used for industry
used for sanitation
used for transportation
solidPhaseName ice
solventFor many ionic compounds
many polar organic compounds
specificHeatCapacity 4.18 J/(g·K)
standardState liquid
stateAtRoomTemperature liquid
surfaceTensionAt20°C about 72.8 mN/m
taste tasteless
thermalConductivityAt25°C about 0.6 W/(m·K)
triplePoint 0.01 °C at 611.657 Pa
UNNumber UN 3082
viscosityAt20°C about 1.0 mPa·s

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Deepa Mehta knownFor Water
Great Oxidation Event locatedIn Water
this entity surface form: Earth hydrosphere