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Celsius is a scale and unit of measurement for temperature. It is named after the Swedishastronomer Anders Celsius(1701-1744), who developed a similar temperature scale two years before his death. Thedegree Celsius (°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperatureinterval, a difference between two temperatures or an uncertainty. The unit was known until 1948 as centigrade from the Latin "centum"translated as 100and "gradus" translated as "steps".

From 1744 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 being the working material[citation needed] 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 points: absolute zero, and the triple point of VSMOW(specially prepared water). This definition also precisely relates the Celsius scale to the Kelvin scale, which defines the SI base unit of thermodynamic temperature (symbol: K). Absolute zero, the hypothetical but unattainable temperature at which matter exhibits zero entropy, is defined as being precisely 0 K and −273.15 °C. The temperature value of the triple point of water is defined as being precisely 273.16 K and 0.01 °C.[1]

This definition fixes the magnitude of both the degree Celsius and the kelvin as precisely 1 part in 273.16 (approximately 0.00366) of the difference between absolute zero and the triple point of water. Thus, it sets the magnitude of one degree Celsius and that of one kelvin as exactly the same. Additionally, it establishes the difference between the two scales' null points as being precisely 273.15 degrees Celsius (−273.15 °C = 0 K and 0 °C = 273.15 K).[2]

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Related Questions

What temperature Celsius is tepid water?

Tepid water is warm water that is around room temperature, or a little warmer. Tepid water is about 20-30 degrees Celsius.


Which is colder 40 Celsius or 0 Celsius?

0 degrees Celsius is a colder temperature than 40 degrees Celsius. 0 degrees Celsius is the freezing level for water. Any positive number above 0 degrees Celsius is a warmer temperature.


Which is warmer 100 degrees Celsius or 100 degrees Fahrenheit?

100 degrees Celsius is more than twice as warm as 100 degrees Fahrenheit.


What is the temperature in Celsius if the water is boiling?

The temperature in Celsius at which water boils is 100 degrees.


When the temperature is 0 degrees Fahrenheit is it warmer or colder that the freezing temperature of water?

The freezing temperature of water is 0 degrees celsius or 32 degrees fahrenheit so it is colder than the freezing temperature of water.


What is the state of water at 5 degree celsius?

Liquid because 0 degrees Celsius is the freezing point so 5 degrees Celsius is warmer than the freezing point. So yah, luquid.


What is warmer ice or steam?

Steam is warmer because it's not freezing like ice.


What happens at 0 degrees Celsius to 3 degrees Celsius?

At 0 degrees Celsius, water freezes and solidifies into ice. Between 0 and 3 degrees Celsius, the water remains in a partially frozen state with some ice crystals forming while the remaining water stays in liquid form.


What significance does 0 degrees Celsius have?

0 degrees Celsius is the temperature at which water will freeze. This system of measuring temperature uses water as a basis where 0o Celsius is the temperature at which water freezes and 100o Celsius is the temperature at which water boils.


What is the temperature scale on which water boils at 100 degrees?

Water boils at 100 degrees Celsius on the Celsius temperature scale.


What is the temperature range of liquid water in Celsius?

Liquid water has a temperature range of 0 to 100 degrees Celsius. At 0 degrees Celsius, water freezes into ice, and at 100 degrees Celsius, water boils into steam.


What would feel warmer - a bucket of water at 50 degrees Celsius or a bathtub filled with water at 25 degrees Celsiuswhich of these stored more energy?

The bucket of water at 50 degrees Celsius would feel warmer because it has a higher temperature. However, the bathtub filled with water at 25 degrees Celsius likely stores more energy due to its larger volume of water even though it may feel cooler.