3 ms·
0 degrees Celsius being the freezing temperature of water at sea-level atmospheric pressure, that doesn't make much more sense either :-)
by gregschlom 10y ago
0 degrees Celsius being the freezing temperature of water at sea-level atmospheric pressure, that doesn't make much more sense either :-)
- komali2 10y agoWhy not? That's just one of the ways to measure the "constant" 0 degrees Celsius. What that temperature is doesn't change just because you're at different air pressure. You don't say "water boils at 100 degrees celsius at every altitude," you say "huh neat water boils at different temperatures at different altitudes."
- the8472 10y agotechnically it's defined as 0.01°C being the triple point of water. And since the solid-liquid boundary in the phase diagram[0] is relatively stable across wide pressure ranges that means that 0°C being the melting point is not just true at a single pressure value. [0] https://upload.wikimedia.org/wikipedia/commons/0/08/Phase_diagram_of_water.svg https://upload.wikimedia.org/wikipedia/commons/0/08/Phase_di...