the boiling point of water is 100 degrees celsius express this in si units
100 °C
title: Introduction to the metric system text: the tonne is not an SI Unit, its continued use in many countries has led to it being "accepted for use within SI". The degree Celsius (symbol: °C) came into use in its present form in 1744 when 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. Before 1948 the unit was known as "centigrade" from the Latin "centum" translated as 100 and "gradus" translated as "steps". However, in France and Spain, the word ""centigrade"" also meant 0.0001 of a title: Boiling point text: boiling point of water" at a standard pressure of 100 kPa (1 bar) is . For comparison, on top of Mount Everest, at elevation, the pressure is about and the boiling point of water is . The Celsius temperature scale was defined until 1954 by two points: 0 °C being defined by the water freezing point and 100 °C being defined by the water boiling point at standard atmospheric pressure. The higher the vapor pressure of a liquid at a given temperature, the lower the normal boiling point (i.e., the boiling point at atmospheric pressure) of the liquid. The vapor title: Celsius text: called "centigrade", from the Latin "centum", which means 100, and "gradus", which means steps. From 1743 to 1954, the Celsius scale was based on 0 °C for the freezing point of water and 100 °C for the boiling point of water at 1 atm pressure. Prior to 1743, the scale was also based on the boiling and melting points of water, but the values were reversed (i.e. the boiling point was at 0 degrees and the melting point was at 100 degrees). The 1743 scale reversal was proposed by Jean-Pierre Christin. By international agreement, since 1954 the unit and the title: Water text: decreed definition of the gram specified water at —a highly reproducible "temperature"—the scientists chose to redefine the standard and to perform their measurements at the temperature of highest water "density", which was measured at the time as . The Kelvin temperature scale of the SI system is based on the triple point of water, defined as exactly . The scale is an absolute temperature scale with the same increment as the Celsius temperature scale, which was originally defined according to the boiling point (set to ) and melting point (set to ) of water. Natural water consists mainly of the title: Celsius text: Celsius scale are defined by absolute zero and the triple point of Vienna Standard Mean Ocean Water (VSMOW), a specially purified water. This definition also precisely relates the Celsius scale to the Kelvin scale, which defines the SI base unit of thermodynamic temperature with symbol K. Absolute zero, the lowest temperature possible, is defined as being exactly 0 K and −273.15 °C. The temperature of the triple point of water is defined as exactly . This means that a temperature difference of one degree Celsius and that of one kelvin are exactly the same. In 1742, Swedish astronomer Anders Celsius