Vienna Standard Mean Ocean Water

Examples of Vienna Standard Mean Ocean Water in the following topics:

• Absolute Temperature

  • Absolute temperature is the most commoly used thermodyanmic temperature unit and is the standard unit of temperature.
  • The kelvin (or "absolute temperature") is the standard thermodyanmic temperature unit.
  • By international agreement, the unit kelvin and its scale are defined by two points: absolute zero and the triple point of Vienna Standard Mean Ocean Water (water with a specified blend of hydrogen and oxygen isotopes).
  • The triple point of water is defined precisely as 273.16 K and 0.01 °C.

• Celsius Scale

  • From 1743 until 1954, 0°C was defined as the freezing point of water, and 100°C was defined as the boiling point of water, both at a pressure of one standard atmosphere, with mercury as the working material.
  • Although these defining correlations are commonly taught in schools today, by international agreement the unit "degree Celsius" and the Celsius scale are currently defined by two different temperatures: absolute zero and the triple point of Vienna Standard Mean Ocean Water (VSMOW; specially purified water).
  • "The output of the heat exchanger is hotter by 40 degrees Celsius" and "Our standard uncertainty is ±3°C").
  • The dotted line illustrates the anomalous behavior of water.
  • Note that water changes states based on the pressure and temperature.