Now, we all know that at 0° Celsius, ice melts into water. We also know that at the same temperature, water freezes and turns into ice. So let me ask:
What happens when you put water into a freezer where the temperature is exactly 0° Celsius?
2007-08-16 22:35:39 · 18 answers · asked by C. Lex 2 in Science & Mathematics ➔ Other - Science
...You are right that ice freezes at 0 degrees celcius, but the temperature needs to rise higher than that to get ice melting again. For instance, when water puddles are frozen outside in the winter, and the temperature stays low (but not below 1 degree C) the ice stays frozen.
If you put water into a freezer at zero degrees, it will freeze, simple as that. No paradox here.
2007-08-16 22:39:48 · answer #1 · answered by Artist 4 · 1⤊ 2⤋
You are right that water freezes at 0 C and melts at 0C. It depends on whether heat is being added or removed from the sample. It takes 80 calories per gram to melt ice, or 80 calories per gram being taken away to freeze water. At exactly 0 C the water would sit there. Until you actively take away some of the heat in the water at zero it will not start to freeze.
2007-08-18 01:57:33 · answer #2 · answered by science teacher 7 · 0⤊ 0⤋
Both happen.
The temp inside the freezer won't be exactly 0° C everywhere. And even if it were, the water wouldn't be pure, and if it were, the internal energy of the water wouldn't be exactly uniform.
So, with *that* said, the 'water' would be a mixture of water and ice. Both would exist. Don't forget, with some mass of water, it takes heat some amount of time to enter or exit. This also helps create inhomogeneity in the liquid causing 'warmer' and colder regions to form, thus giving rise to both water and ice existing at the same time.
2007-08-17 01:51:27 · answer #3 · answered by Anonymous · 1⤊ 0⤋
At 0° Celsius, H2O exists in a state of Ice and Water. Similarily at 100° Celsius, H2O exists in a state of Water and Steam. The reason for this is because at 0° and 100° Celsius, a change of state of matter occurs. When calculating change in enthaply for say a solid piece of ice into water and then into steam, at 0° Celsius you account for what is known as the Heat of Fusion and at 100° Celsius you account for what is known as the Heat of Vaporization. You can of course go in the reverse, but instead of calling it Heat of Vaporization, its known as the Heat of Condensation. Nevertheless, for that brief exact temperature points, you do have H2O existing as both ice and water.
2007-08-18 01:40:23 · answer #4 · answered by achaminadefriend 5 · 1⤊ 0⤋
0 degrees celsius is the freezing temperature of water---so water in a 0 degrees Celsius freezer would freeze
2007-08-16 22:46:51 · answer #5 · answered by Alan N 2 · 0⤊ 2⤋
It takes energy to melt water.
Ice gives up energy as it melts.
If there were no energy input or drain, an equilibrium would exist at 0 C., and any melting would be balanced by freezing.
2007-08-17 16:01:58 · answer #6 · answered by Irv S 7 · 1⤊ 0⤋
The water will freeze due to removal of heat in the freezer
2007-08-16 22:41:17 · answer #7 · answered by t.s k 2 · 1⤊ 1⤋
It depends on the condition and composition of the water. Lets assume there are no impurities in the water, based on the freezing point theory, the water will freeze.
2007-08-17 01:43:13 · answer #8 · answered by 痴心情长剑 3 · 1⤊ 1⤋
yes, zero degree is the melting point of ice, which means the ice starts melting into water once the temparature raises from that point ie., 1 degree or further high
in a freezer maintained in zero degree it remains ice
2007-08-16 22:50:29 · answer #9 · answered by Sneha 1 · 1⤊ 1⤋
some will melt and some will freeze untill we reach equilibrium where the amount that melts=amount that freeze
but at degree 0 i know it freeze it requires higher temp to melt
2007-08-16 22:45:55 · answer #10 · answered by Anonymous · 0⤊ 1⤋