2006-08-20 15:22:08 · 18 answers · asked by ladytigerC 1 in Science & Mathematics ➔ Chemistry
Until 1954 the scale was defined with the freezing point of water at 0 °C and the boiling point at 100 °C at standard atmospheric pressure. This definition is still a close approximation to the modern definition.The modern Celsius scale sets 0.01 °C to be at the triple point (the temperature and pressure at which three phases [gas, liquid, and solid] of that substance may coexist in thermodynamic equilibrium) of water and a degree Celsius to be 1/273.16 of the difference in temperature between the triple point of water and absolute zero.
2006-08-21 04:21:08 · answer #1 · answered by Sander O 2 · 0⤊ 0⤋
Anders Celsius labeled 0 degrees as the point at which water freezes.
2006-08-20 18:50:37 · answer #2 · answered by Kevin H 7 · 0⤊ 0⤋
That is the temperature when water freezes in Celsius scale, which is equivalent to +32 degrees on Fahrenheit scale.
2006-08-20 15:38:21 · answer #3 · answered by Yadu M 3 · 0⤊ 0⤋
temperature at which pure water melts.
When cooling liquid water or water vapor, things are more complicated. Both liquid water and water vapor can be cooled to temperatures lower than 0 C without immediately forming solid ice. Sometimes in carefully controlled conditions for quite a long time. The reason for this is for liquid water, or water vapor, to form ice crystals, there must be a site for the formation of the ice to begin. When that does ice formation is very rapid. These non-equilibrium conditions are said to be supercooled.
2006-08-20 16:00:46 · answer #4 · answered by Charity 3 · 0⤊ 0⤋
well, under normal atmospheric pressure, distillied water freezes (or melts) at 0 celsius
2006-08-20 15:29:30 · answer #5 · answered by enginerd 6 · 1⤊ 0⤋
Bah Hum Bug Lilminzaniml, you beat me to it.
Now, what is the significance of -40 Celsius?
Vaya con DIOS.
2006-08-20 15:30:39 · answer #6 · answered by chrisbrown_222 4 · 0⤊ 0⤋
It is the freezing point of water at atmospheric pressure. It became the reference for temperature measurement in celcius units.
2006-08-20 15:40:47 · answer #7 · answered by cooler 2 · 0⤊ 0⤋
The freezing point of water
2006-08-20 17:06:06 · answer #8 · answered by Rajchem 2 · 0⤊ 0⤋
0 Celsius represents ABSOLUTE ZERO.
2006-08-21 02:39:16 · answer #9 · answered by Denim 2 · 0⤊ 0⤋
It is the freezing point for Fahrenheit it is 32.
2006-08-20 15:28:50 · answer #10 · answered by Marla 6 · 0⤊ 0⤋