Does the temperature of water affect the time it takes for the water to freeze? This is a question of an investigate project to a scientific fair.
2006-10-25 11:17:14 · 13 answers · asked by Eileen C 1 in Science & Mathematics ➔ Physics
At 1 atm(i.e. constant pressure)...Yes, because it has to first get down to 0C before it can freeze.
2006-10-25 11:24:46 · answer #1 · answered by feanor 7 · 0⤊ 0⤋
Strangely enough, hotter water MAY freeze quicker than colder water, but only under certain circumstances. All else being equal, the colder the water initially, the faster it will freeze.
However, the freezing point of a solvent (water) is lowered when solutes are dissolved in it. These solutes may be solid, liquid, or gas. Water from a household tap generally flows through an aerator (the thingy on the end of the faucet) that makes the water all bubbly and causes the water to dissolve oxygen and other gasses from the air (the bubbler in your aquarium is doing the same thing). This significantly LOWERS the freezing point of the water.
Now take some of that water and boil it. See the bubbles coming out? A lot of that is from the dissolved gasses. This significantly RAISES the freezing point of the water.
The result is that if you take some tap water and just bring it to a boil and then remove from heat, and then take a similar volume of hot tap water from an aerated faucet and place the two in a freezer side by side, the boiled water will freeze first, even though there's no question it was hotter at the start.
2006-10-25 19:03:03 · answer #2 · answered by dollhaus 7 · 0⤊ 0⤋
If you have a gram of water that is 100 degrees and a gram of water that is 30 degrees and you put both into a freezer at the same time....The 100 degree water must lose 100 degrees to get to freezing (0 Celcius) but the 30 degree water only has to lose 30.
What people might be thinking of is that the heat transfer rate is higher when the water is hotter and it slows as the water is reaching equivibrium with the freezer temperature. The shape of the heat loss curve is the same for both the warmer and cooler water, it's just that the cooler water starts out further down on the curve.
Therefore, the hotter the water, the longer it will take to freeze.
2006-10-25 18:56:34 · answer #3 · answered by Suedoenimm 3 · 0⤊ 0⤋
The answer to your question is Yes.
The higher temperature water contains more heat. The heat must flow out of the water until the water reaches freezing temperature. This takes time. The more heat there is, the more time it takes.
If you have a refrigerator, try it. Just remember that the water samples must also be equal in volume.
2006-10-25 18:34:01 · answer #4 · answered by briggs451 5 · 0⤊ 0⤋
Warmer will freeze faster as it loses heat more rapidly than the cooler water because of the greater temp difference. This rapid loss of heat actually builds up a momentum in the rate of heat loss that overtakes the cooler water. Now obviously if you have 1 ice cube tray at 1C and the other at 99C, the cooler will freeze first. There is a point of equal times. I don't know that point off the top of my head though.
2006-10-25 19:51:01 · answer #5 · answered by orlandobillybob 6 · 0⤊ 0⤋
at a standard pressure the higher the water temperature, the longer it will take to freeze because of the greater ammount of heat transfer required to remove latent heat. Once the lattice structure starts to develop forming ice crystals, the water will be around 0C and your starting temperature is irrelevant.
2006-10-25 18:26:23 · answer #6 · answered by Max J 5 · 0⤊ 0⤋
How could hot water freeze faster than cold water when the hot water would have to cool down to the cold water's temperature before it cooled down to freezing?
2006-10-25 18:30:05 · answer #7 · answered by Nomadd 7 · 0⤊ 0⤋
If you put boiling water in the freezer it needs time to cool before it can freeze, so I would assume the answer is yes. Put a cup of cold tap in the freezer and a cup of boiling and check every couple minutes to see which one starts to from ice on top first
2006-10-25 18:25:40 · answer #8 · answered by aimiejs77 2 · 0⤊ 0⤋
Interesting. My ex's new boyfriend said that hot water freezes
faster than cold or lukewarm water so they always filled the ice
cube trays with hot water. I just laughed because the hot water
may have froze faster but it also caused defrosting in the freezer
and some of that dripped into the icecube trays and everyone in
the house was sick and didn't know why
2006-10-25 18:26:54 · answer #9 · answered by Mailman Bob 5 · 0⤊ 0⤋
as a matter of fact, water only freezes at 0 celcious if it higher than that, it wont freeze....and yes, water freezes faster in lower temperatures.
2006-10-25 18:25:44 · answer #10 · answered by HIM 2 · 0⤊ 0⤋
Yes, but the time is also affected by the environment and amount of heat transfer from the water.
2006-10-25 18:25:24 · answer #11 · answered by dapixelator 6 · 0⤊ 0⤋