Ice at 273K can cool a substance faster than water at the same temperature . why?
610449
The latent heat of fusion -- once you cool water to 0°C, you have to remove more heat to actually crystallize it.\n\nIce at 0°C requires the addition of heat to melt into water at 0°C.  That heat comes from whatever you are cooling.\n\nThe latent heat of fusion for ice is 333.6 joules/gram
801465
The coldest temperature that anything can reach is –273.15 °C. That is called "absolute zero". On the Kelvin scale, which uses the same divisions as the Celsius scale, it is zero, making the point at which water freezes 273.15 °K. Absolute zero is the point at which all atomic movement ceases, i.e. the atoms no longer move relative to one another.\n\nAny material can be heated or cooled to any temperature, as long as enough energy can be added or removed to do so. Materials left in an environment for long enough will reach the same temperature as their surroundings. This is known as reaching equilibrium with the environment.
596740
Like everyone else said, it makes the drink cooler. However, this is because heat is transferred in an attempt to achieve equilibrium. In this case, the equilibrium would be between the temperature of the ice and that of the drink. Because the average temperature of the drink is higher than that of the ice, heat flows out of the drink and into the ice, slowly levelling the temperature.
184315
It's 277K.\nWater density is greatest at 4 degrees Celsius (O degrees Celsius = 273K, so 4 degrees Celsius = 277K).\nWhen the temperature decreases to 0 Celsius, the density of water decreases to 0.999 g/cm^3 and the volume increases about 10%.\nThat's why ice floats on rivers - because at 0 degrees Celsius it has lower density than water!\n\nGreetings from Poland!
241754
Thermal intertia.  It works the other way too, cold water boils quicker than hot water.  The reason is when hot water is placed into the ice cube tray it immediately begins cooling.  Then when you put it into the freezer it continues to accelerate more and more quickly to the low temp desired.  Cold water would begin warming as soon as it gets put into the tray and then you have to cool it back down (opposite direction heating takes more energy)
220158
Do not offer bribes, this is immoral.\nMany here come to assist as a service.\n\nYour answer is here:\n\nWhen ice melts, kinetic energy of H2O molecules is increased by absorption of heat energy from the surroundings.\n\nHowever as the kinetic energy is increased to make the molecules move freely, Hydrogen Bonding among the water molecules becomes more effective and so a particular intermolecular distance is maintained among the molecules. \n\nThis is effective upto 4C.\n\nAfter 4C the H-bonding becomes so week as against kinetic energy that free movement of molecules is no more restricted and thus abnormal behaviour of water molecules is stopped.
196823
The fact that ice always floats on water should give you a clue!  The ice is obviously not as dense.  So you can infer from this something has happened during the freezing process.\n\nThe structure of a water molecule is One atom of hydrogen to two if oxygen.  As the water freezes hydrogen bonds form between the various water molecules and these stop the molecules packing as effectively so the ice is less dense.\n\nTry the source below.
868477
water freezes at 32 degrees Fahrenheit, and 0 degrees Celsius\n\nthe colder the faster
41441
A note on Composure's comments: Ice is an exception to the rule and is by no means typical.  Usually, melting fluid becomes less dense (ie occupies more space) than the solid.  Ice is different because the bent structure of the highly polar water molecule doesn't allow for even crystal formation.\n\nUsually the transition will occur at a specific temperature.  As you add heat to the system, the temperature remains constant while the solid:liquid ratio gradually decreases.  Once the solid melts completely, additional heat added will raise the temperature.
716723
ice never melts when it is in an environment of 0C.  any environment above that temperature will eventally raise the temperature of the ice to its melting point...\n\nit is an inherent property of ice to melt at temperatures above 0C.\n\ndry ice is not ice.\nsteel is not ice.\nice is solid water which is only found at or below 0C (at atmospheric pressure).\n\nthis has to do with the gibbs free energy of the transformation \nH2O (solid) ----> H2O (liquid)
762753
The interactions between the carbon dioxide molecules are stronger, and thus it forms a solid at a higher temperature.\n\nIn water, the attractions are even stronger and you only need to go to zero degrees to get a solid. If you go to 100 degrees water becomes a gas. (temperatures in celcius)\n\nSimilarly for other molecules, if the atrraction between them is strong you get solids and liquids at higher temperatures than for less cohesive molecules.
174433
273K = 0 degrees celsius therefore water freezes\n\nre jackster: freezing point and melting point are the same\nre kay: absolute zero is 0K at which all particles stop moving .. 273K is not absolute zero
119086
The molecules of water are closer together and constantly moving, whereas the molecules of ice are in a crystal lattice, meaning they're in a rigid formation. When water freezes, the molecules spread out a little more to form the crystal lattice. Since density is mass over volume, and ice has takes up more volume than water, the density of ice is lesser than that of water. Which makes ice float on water.
1096429
Ice requires a crystalline lattice structure. The salt ions (Na+ and Cl-) physically interfere with the formation of that lattice structure by standing in the way of water molecules. A lower temperature is therefore necessary to form ice and so water that contains ionic salt can drop to lower temperatures before forming ice. The same general effect applies to boiling water. Because the salt prevents molecules from escaping into the atmosphere as gas, the boiling point is raised.\n\nNote: I assume you meant 0 degrees Celsius. The Fahrenheit scale is somewhat different, since water freezes at 32 degrees Fahrenheit. But don't let these numbers cause you to believe something different is going on in the salt/water/ice mixture. The Celsius scale is set such that water freezes at 0 degrees (absent salt). This doesn't mean that at 0 Celsius and below there is no temperature or energy. Just the same, below 0 degrees Fahrenheit compounds still have energy and temperature. Scientists tend to use another scale which more accurately depicts true temperature, which is the Kelvin scale. In the Kelvin scale, absolute zero- the temperature at which all molecules and atoms stop moving- is really 0. But 0 Kelvin is much lower than either 0 Celsius or 0 Fahrenheit. To convert from Celsius to Kelvin, just add 273 degrees (or subtract 273 from Kelvin to Celsius). So 0 Celsius is actually 273 degrees Kelvin.  \n\nIn any case, if you were looking for an answer that has to do with the chemical properties of the salt/ice/water mixture, and why, for example, salt tends to lower the freezing point (or raises the boiling point), my first answer is right.  Any solute you add to a solvent will change the colligative properties of the solvent.  It interferes with the organization of water molecules such that they have a harder time aligning into a crystalline ice pattern, and therefore a lower temperature is required for ice to form. Note also that whenever you have an ice/water mixture, the entire mixture maintains the same temperature until all of the water has turned to ice. That is, in pure water that contains ice, the water will stay at 0 degrees Celsius until all the water has turned to ice, and then the ice will gradually drop in temperature. The salt just lowers that freezing point, but the same applies, just that the salt/water/ice mixture remains at that lower freezing point until all water as frozen, then it drops further in temperature.
1164067
Third Law Of Thermodynamics (I am studying that too)\n\nIt is impossible to reduce the temperature of any system to absolute zero by a finite number of operations.\n\nIf you are asking how much internal energy ice has at -273K, then the answer is zero.\n\nGood luck with this.
745215
The answer is yes. And I bet you want more of an explanation, which gets a little tricky. It would seem evident that cold water would freeze faster than warm water. But there have been raging debates in scientific circles over whether that's true or false. The fact is a lot of different factors contribute to how fast water freezes, including its beginning temperature.\n    Physicists writing in the journal Scientific American have waded into the fray and have probably come the closest to a satisfactory answer. Quoting Paul G. Hewitt in the book Conceptual Physics, the Scientific American writers believe that hot water will freeze faster than lukewarm water, but not faster than cold water. (Except under certain circumstances.)\n    According to Scientific American, water at 90° C will freeze before water that is 60° C. Below 60° C, however, there is a switch and the cooler water will freeze faster. For example, 30° C water will freeze faster than 60° C water. It has to do with the water evaporation of the hot water immersed in a cold environment. The rate of cooling by evaporation is way higher for hot water than for the cooling of lukewarm water.\n    Now, for those certain circumstances. When you put a pan of cold water and a pan of hot water in a freezer (both pans have equal masses of water), the hot water experiences this rapid evaporation AND freezing from below, which cools water on the bottom of the pan. Because the surface water is already warm or hot, the water at the bottom just sits there instead of rising, getting colder and colder. The water at the top experiences evaporation. The combined effect could make the hot water freeze faster than the cold water.
613595
It breaks the hydrogen bonds between water molecules to aid in the melting process. Since this energy is used to break bonds, it can't heat the ice.