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water

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Water
The water molecule has this basic geometric structure
The water molecule has this basic geometric structure
Ball-and-stick model of a water molecule
Ball-and-stick model of a water molecule
Space filling model of a water molecule
Space filling model of a water molecule
  Oxygen, O
  Hydrogen, H
A drop of water falling towards water in a glass
A drop of water falling towards water in a glass
Names
Preferred IUPAC name
Water
Systematic IUPAC name
Oxidane (not in common use)
Other names
  • Hydrogen oxide
  • Hydrogen hydroxide (H2O or HOH)
  • Hydroxylic acid
  • Dihydrogen monoxide (DHMO) (parody name)
  • Dihydrogen oxide
  • Hydric acid
  • Hydrohydroxic acid
  • Hydroxic acid
  • Hydroxoic acid
  • Hydrol
  • μ-Oxidodihydrogen
  • κ1-Hydroxylhydrogen(0)
  • Aqua
  • Neutral liquid
  • Oxygen dihydride (may be considered incorrect)
Identifiers
3D model (JSmol)
3587155
ChEBI
ChEMBL
ChemSpider
DrugBank
EC Number
  • 231-791-2
117
KEGG
RTECS number
  • ZC0110000
UNII
  • InChI=1S/H2O/h1H2 checkY
    Key: XLYOFNOQVPJJNP-UHFFFAOYSA-N checkY
  • O
Properties
H
2
O
Molar mass 18.01528(33) g/mol
Appearance Almost colorless or white crystalline solid, almost colorless liquid, with a hint of blue, colorless gas[1]
Odor Odorless
Density
  • Liquid (1 atm, VSMOW):
  • 0.99984283(84) g/mL at 0 °C[2]
  • 0.99997495(84) g/mL at 3.983035(670) °C (temperature of maximum density, often 4 °C)[2]
  • 0.99704702(83) g/mL at 25 °C[2]
  • 0.96188791(96) g/mL at 95 °C[3]
  • Solid:
  • 0.9167 g/mL at 0 °C
Melting point 0.00 °C (32.00 °F; 273.15 K)
Boiling point 99.98 °C (211.96 °F; 373.13 K)
Solubility Poorly soluble in haloalkanes, aliphatic and aromatic hydrocarbons, ethers.[4]
Improved solubility in carboxylates, alcohols, ketones, amines.
Miscible with methanol, ethanol, propanol, isopropanol, acetone, glycerol, 1,4-dioxane, tetrahydrofuran, sulfolane, acetaldehyde, dimethylformamide, dimethoxyethane, dimethyl sulfoxide, acetonitrile.
Partially miscible with diethyl ether, methyl ethyl ketone, dichloromethane, ethyl acetate, bromine.
Acidity (pKa) 13.995
Basicity (pKb) 13.995
Conjugate acid Hydronium H3O+ (pKa = 0)
Conjugate base Hydroxide OH (pKb = 0)
Thermal conductivity 0.6065 W/(m·K)[5]
1.3330 (20 °C) at 25 °C
Viscosity 0.890 mPa·s (0.890 cP)
Structure
Hexagonal
C2v
Bent
1.8546 D
Thermochemistry
75.385 ± 0.05 J/(mol·K)[6]
69.95 ± 0.03 J/(mol·K)[6]
−285.83 ± 0.04 kJ/mol[4][6]
−237.24 kJ/mol[4]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Drowning
Avalanche (as snow)
Water intoxication
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
0
0
Flash point Non-flammable
Related compounds
Other anions
Related solvents
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Kiejtés

  • IPA: /ˈwɔːtə/
  • hallgatás (US)

Főnév

water (tsz. waters)

  1. víz

Etimológia

Lásd a vatn szót.

Szókapcsolatok

Szólások, közmondások

Ige

water (alapjelen, egyes szám harmadik személy waters, folyamatos melléknévi igenév watering, második és harmadik alakja watered)

  1. megitat
  2. meglocsol
  3. megöntöz
  4. nedvesedik
  5. nedvesít
  6. öntöz

Főnév

water ? (többesszám [nincs megadva], kicsinyítő [nincs megadva])

  1. víz
  1. Forráshivatkozás-hiba: Érvénytelen <ref> címke; nincs megadva szöveg a(z) Braun_1993_612 nevű lábjegyzeteknek
  2. 1 2 3  
  3.  
  4. 1 2 3 Anatolievich, Kiper Ruslan: Properties of substance: water. [2014. június 2-i dátummal az eredetiből archiválva].
  5.  
  6. 1 2 3 Sablon:nist