| Themes > Science > Physics > Cryogenics > Temperature > Temperature Conversions |
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The Celsius scale is a scale for measuring temperature. The Celsius scale is a part of the metric system of measurement. People in most countries of the world use the Celsius scale for everyday temperature measurement. Scientists throughout the world also use this temperature scale. On the Celsius scale, 0 is the freezing point of water and 100 is its boiling point. The scale is divided into 100 equal parts between those fixed points. The Celsius scale is often called the centigrade scale because this word means divided into 100 parts. Absolute Zero & The Kelvin Scale Absolute zero is the theoretical temperature at which the atoms and molecules of a substance have the least possible energy. This temperature, which scientists believe is the lowest attainable, equals -273.15 C. The use of these values for absolute zero is based partly on observations of the relationship between the temperature and pressure of a gas. When the temperature of a gas confined in a fixed volume is lowered, its pressure decreases in direct proportion, as though it would become zero at -273.15 C. A temperature scale that has absolute zero for its zero point is called an absolute temperature scale. One such scale is the Kelvin Scale, the international standard for scientific temperature measurement. On the Kelvin scale, absolute zero equals zero Kelvin (0 K). The word degree and the degree symbol are not used with Kelvin temperature readings. Conversion Rules & Guidelines The Kelvin scale is related to the Celsius scale. A Kelvin temperature can be obtained by adding 273.15 to a corresponding Celsius temperature. For example, 20 C equals 293.15 K. ABSOLUTE ZERO = -273.15 C = 0 K K = C + 273 Examples I Conversion temperatures from Kelvin to Celsius : a. +86 K - 273 = -187 C b. 191 K - 273 = -82 C c. 533 K - 273 = 260 C d. 321 K - 273 = +48 C II Conversion temperatures from Celsius to Kelvin : a. +23 C + 273 = 296 K b. +58 C + 273 = 331 K c. -90 C + 273 = 183 K d. +18 C + 273 = 291 K |
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