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What is the boiling point of water at sea level in degrees Celsius? Answer with the whole number only.

Answer

100
rounding
whole degrees Celsius, as the question requests; the source gives 99.97 C before rounding
seaLevel
standard atmospheric pressure, 1 atm (101.325 kPa)
sources
en.wikipedia.org, codata/nist standard reference: water boils at 100 degrees celsius at standard atmospheric pressure (1 atm) at sea level; a widely cited physical constant, e.g. nist chemistry webbook (webbook.nist.gov) and standard physics/chemistry references., en.wikipedia.org, iapws, faqs about water and steam, faq 1: https://iapws.org/faqs/faq1 (states water boils at approximately 100 °c at standard atmospheric pressure)., iapws.org, nist (national institute of standards and technology), https://www.nist.gov - standard boiling point of water at 1 atm is 100 degrees celsius (373.15 k), nist chemistry webbook (iapws-95 water properties): saturation temperature at 101.325 kpa is 100 °c, nist chemistry webbook (webbook.nist.gov) and general physical chemistry reference texts: the boiling point of pure water at standard sea-level atmospheric pressure (1 atm) is 100 degrees celsius, nist chemistry webbook (webbook.nist.gov) and iapws industrial formulation 1997 for the thermodynamic properties of water and steam, both of which give the normal boiling point of water at 1 atm (sea level standard pressure) as 100 degrees celsius, nist chemistry webbook (webbook.nist.gov) and iupac standard atmosphere reference: water boils at 100 degrees celsius at standard sea-level atmospheric pressure (1 atm), nist chemistry webbook (webbook.nist.gov) and standard physics/chemistry references: water boils at 100 degrees celsius at 1 atm (sea level) pressure, nist chemistry webbook (webbook.nist.gov) and standard physics/chemistry references: water boils at 100 degrees celsius at standard atmospheric pressure (1 atm) at sea level, nist chemistry webbook / codata and crc handbook of chemistry and physics: water boils at 100 °c at 1 atm (101.325 kpa), nist chemistry webbook / codata physical constants: water boils at 100 °c (373.15 k) at standard atmospheric pressure of 1 atm, the standard definition of the boiling point of water at sea level., nist chemistry webbook / crc handbook of chemistry and physics: water boils at 100 °c at 1 atm (101.325 kpa), nist chemistry webbook / general physical chemistry reference (standard boiling point of water at 1 atm is 100 degrees celsius), nist chemistry webbook / general physical chemistry reference: water boils at 100 degrees celsius at standard atmospheric pressure (1 atm) at sea level, nist chemistry webbook / general physical chemistry reference: water boils at 100 degrees celsius at standard sea-level atmospheric pressure (1 atm), nist chemistry webbook / iapws saturation data (water boils at 100 °c at 1 atm); also the standard definition of the celsius scale, which fixes 100 °c as water's boiling point at 1 atm. read from reference knowledge, not fetched live in this run., nist chemistry webbook / iapws water saturation tables: water boils at 100 °c at 1 atm (101.325 kpa), nist chemistry webbook / iupac physical constants: boiling point of water at 1 atm is 100 degrees celsius (373.15 k), the defining reference point of the celsius scale, nist chemistry webbook / standard physical chemistry reference: boiling point of water at 1 atm (101.325 kpa) is 100 degrees celsius, nist chemistry webbook / standard physical chemistry reference: water boils at 100 degrees celsius at standard sea-level atmospheric pressure (1 atm), nist chemistry webbook / standard physics reference: the normal boiling point of pure water at 1 atm (standard sea-level pressure) is 100 degrees celsius, nist chemistry webbook / standard physics reference: the normal boiling point of pure water at 1 atm is 100 degrees celsius, nist chemistry webbook / standard physics reference: water boils at 100 degrees celsius at 1 atm (sea level) pressure, nist chemistry webbook / standard physics reference: water boils at 100 degrees celsius at 1 standard atmosphere (101.325 kpa) sea-level pressure, nist chemistry webbook / standard physics reference: water's normal boiling point at 1 atm (sea level) is 100 degrees celsius, nist chemistry webbook / standard reference data: water boils at 100 °c at 1 atm (101.325 kpa), nist chemistry webbook and standard physics reference tables (water boils at 100 °c at 1 atm); also wikipedia 'boiling point' article, water section, nist, si units – temperature (boiling point of water: 100 °c), https://www.nist.gov/pml/owm/si-units-temperature; energy education, boiling point (water boils at 100 °c at sea-level pressure), https://energyeducation.ca/encyclopedia/boiling_point, nist, si units – temperature (https://www.nist.gov/pml/owm/si-units-temperature); iapws, faq: boiling and altitude/pressure (https://www.iapws.org/faq1/boil.html), nist, si units – temperature (https://www.nist.gov/pml/owm/si-units-temperature); nist, measurements for the household, circular of the bureau of standards no. 55, table 1 (https://nvlpubs.nist.gov/nistpubs/legacy/circ/nbscircular55.pdf), which lists sea level at 100.0 °c., nist, si units – temperature: https://www.nist.gov/pml/owm/si-units-temperature (lists water's boiling point as 100 °c and says water boils at about 100 °c on the celsius scale)., nist, si units – temperature: https://www.nist.gov/pml/owm/si-units-temperature (states water boils at about 100 °c; touchstone temperatures table lists boiling point as 100 °c)., ntrs.nasa.gov, nvlpubs.nist.gov, openstax.org, standard physical chemistry reference fact: the normal boiling point of water at sea level (1 atm) is 100 degrees celsius, as defined by the celsius scale's original calibration points and confirmed by nist/iupac physical constants references., standard physical chemistry reference fact: water boils at 100 degrees celsius at standard atmospheric pressure (1 atm) at sea level (e.g. nist chemistry webbook / general physics and chemistry textbooks)., u.s. geological survey, facts about water (https://www.usgs.gov/index.php/special-topic/water-science-school/science/facts-about-water): states that at sea level water boils at 212°f (100°c)., u.s. geological survey, facts about water, https://www.usgs.gov/index.php/special-topic/water-science-school/science/facts-about-water (states water boils at 100°c at sea level)., u.s. geological survey, facts about water: https://www.usgs.gov/water-science-school/science/facts-about-water?items_per_page=6&page=1, u.s. geological survey, how hot are yellowstone’s boiling waters? some are hotter than others: https://www.usgs.gov/observatories/yvo/news/how-hot-are-yellowstones-boiling-waters-some-are-hotter-others, u.s. geological survey, ‘how hot are yellowstone’s boiling waters? some are hotter than others’ (pure water at one atmosphere boils at 100 °c): https://www.usgs.gov/observatories/yvo/news/how-hot-are-yellowstones-boiling-waters-some-are-hotter-others, web search (standard mode) for 'boiling point of water at sea level 100 degrees celsius'; results agree the normal boiling point is 100 c (212 f) at sea level. search result links were low-quality aggregator pages, so the figure rests on the long-established standard value (nist/iupac reference values for 1 atm) rather than on any single page., webbook.nist.gov, wikipedia, 'boiling point' article (https://en.wikipedia.org/wiki/boiling_point): water boils at 100 c, rounded from 99.97 c, under standard pressure at sea level, www.nist.gov, www.usgs.gov

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    #1314100NIST Chemistry WebBook (webbook.nist.gov) and IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam, both of which give the normal boiling point of water at 1 atm (sea level standard pressure) as 100 degrees Celsius
    #61100NIST Chemistry WebBook / IAPWS saturation data (water boils at 100 °C at 1 atm); also the standard definition of the Celsius scale, which fixes 100 °C as water's boiling point at 1 atm. Read from reference knowledge, not fetched live in this run.
    #1427100NIST Chemistry WebBook / standard physical chemistry reference: water boils at 100 degrees Celsius at standard sea-level atmospheric pressure (1 atm)
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