does sugar and flour melt ice? i'm doing a science project.?
114256
You know that salt melts ice.\n\nDo a controlled experiment.  Set up four treatments using ice cubes in separate dishes.\n\n1: Ice alone.\n2: Ice + salt.\n3: Ice + sugar.\n4: Ice + flour.\n\nLook at the dishes every couple of minutes and write down what you see--which dishes have water and how much.  \n\nAfter a certain time, say 15 minutes or 30 minutes, remove the remaining ice (if there is any) and measure the amount of water that melted for each dish.\n\nRepeat the experiment at least one more time (more than one repeat is desirable).  \n\nPrepare a table that shows the results of your observations.  Look over the table and draw conclusions.
663971
actually you dont need warm water to dissolve ice, once ice is exposed to a higher temperature than its own it will melt, thermodynanics.
754837
ice cream melting- physical change as wwhen u freeze liquid ice cream it turns back to ice cream.\n\nsugar dissolving in water- chemical as once the sugar is dissolved ou have to use chemical meathods to get the sugar out from the water.\n\ncandle burning- chemical as when the candle is burning it orduces heat which cannot be got back if we rebuild the melted candle.\n\nbathroom mirror fogging up during a shower- physical as you can wipe the fogg out and if you want it agun have a hot tub of hot water near the galss.\n\nmilk turning sour- chemical as you cannot use phusical methods to turn sour milk into milk.\n\nhope it really helps!!!!!!!!!
106372
u know that ice is H20 right? but that's not enough. it would easily melt if that's pure ice. so there is a Salt there. NaCl. why? because water or an ice slowly melts when thre is a substance. and vice versa when the water boils with salt.
162986
We typed "how does salt melt ice" into the Yahoo! Search box and were soon traveling the well-worn path to How Stuff Works. \nThere we learned that the answer has to do with melting points. Most people know that water freezes at a temperature of 32°Fahrenheit (0°Celsius). Salt dissolves fairly rapidly in ice, lowering its freezing point in an effect known as freezing point depression, and melting it in the process. \n\nBut what's going on at the molecular level? Basically, salt molecules are bonding with water molecules, making it more difficult for ice to form. The result is a solution with a lower freezing temperature. For example, a 10% salt solution freezes at 20°F (-6°C), while a 20% salt solution freezes at 2°F (-16°C). \n\nYou've also probably noticed the effect of salt water on freezing points if you've tried to make ice cream or if you've wondered why the ocean doesn't freeze at the same time as bodies of fresh water, such as rivers, lakes, and ponds.
573070
Water, sugar water, then salt water.\n\nSalt dissolves into 2 ions Na+ and Cl- per molecule, whereas sugar only dissolves into one sugar molecue. The greater the number of particles in solution, the lower the freezing point goes.
183278
A chemical change would imply that the components of the water(molecules etc.) are altered. However ice melting is water being changed from a solid to a liquid while the actual properties of the water remain the same. It is therefore a physical change not a chemical change.
216514
That all depends on the altitude. At 1 atmosphere of pressure (sea-level), the melting point is 32F and 0C. At higher pressures, this temperature lowers. This is why ice skating works. The pressure of the blade causes the ice to melt, letting the skate glide.
134404
Salt decrease the melting point of water so adding salt to ice wich is fresh water will make it melt at a lower temperature than 0 celsious.
259675
A rough example as follows:\n\nQuestion: What happens to ICE when you PLACE IT IN WARM WATER?\n\nHypothesis: IT TURNS INTO LIQUID.\n\nMaterials: ICE, CONTAINER, WARM WATER.\n\nSteps: 1.  FILL CONTAINER HALF WAY WITH WARM WATER.\n       2.  PLACE ICE IN CONTAINER.\n\nObservations:  I OBSERVED THE ICE MELT.  THE ICE TRANSFORMED FROM A SOLID TO A LIQUID.\n\nConclusion: ICE A SOLID CAN TRANSFORM INTO WATER A LIQUID WITH THE ASSISTANCE OF INCREASED TEMPERATURE.
986318
Melting means "turn into a liquid."  Ice will melt into liquid water.\n\nSmelting means "turn into a metal from an ore."  This includes a melting or fusing, but the word is always used with a metallic ore.  Iron oxide can be smelted into metallic iron.
787766
There is no set speed because ice melts from the outside first. A solid block of ice, 1000g, will melt more slowly than 1000g of ice cubes, which will melt slower than 1000g of crushed ice. The more surface area exposed, the faster it melts. Also, it depends on the temperature of the ice. Ice from a -5C freezer will melt faster then ice from a -30C freezer.\n\nYou have asked this question twice. Why don't you carry out an experiment and find it our for yourself, using a kitchen scale, a timer, and a thermometer?
122405
erm, high, like really hot. ok, the melting point of α-D-glucose: 146°C\nβ-D-glucose: 150°C [1]\nit probably decomposes before it boils but i found this phase change data [2]\n\nQuantity Value Units Method Reference Comment \nTfus 423. K N/A Kofler and Sitte, 1950 Uncertainty assigned by TRC = 3. K; With "hot stage" \nTfus 420. K N/A Kofler and Sitte, 1950 Uncertainty assigned by TRC = 4. K; By "differntial thermal absorption" \nTfus 414. K N/A Parks and Thomas, 1934 Uncertainty assigned by TRC = 2. K
5352
This is a simple and complex question all in one.  I was a chemical engineer before I became a registered nurse and believe me, this could have a very detailed and complex answer to it.  However, I will simply say that it is due to the other compounds in tap water that affect the melting of ice.  Water and ice have been studied extensively and just about any website dealing with chemistry would be able to help you with this question.  If you want something very detailed, let me know.
1083390
The water around an iceberg or floe becomes colder than freezing (like putting ice cubes in a drink), but won't turn to ice since it is salty.  And waters in the polar regions are down near freezing to begin with.  When the berg gets sunlight some of the surface will melt off.  When the berg finally drifts to warmer waters, it will melt until it is gone.\n\nFor an example: Take a sink and fill it with water.  Put in some rock salts and stir until dissolved.  Now put in several trays' worth of ice cubes.  Stir.  Some of the cubes will melt since the tap water was not freezing, but eventually the sink water will get to a temperature below 32 degrees F or 0 degrees C without freezing solid.  At that point the coldness of the water keeps the remaining ice cubes frozen and the ice cubes keep the water at a below freezing temp.  Eventually it will melt cause there will be heat absorption into the system raising the water temperature, but it will take awhile.
869302
1) Calculate the heat needed to melt 100 grams of ice completely: \nMass of ice * Heat of Fusion\n100g * 333J/g = 33300 J\n\n2) Calculate the cooling we can obtain \nMass of water * specific heat of water * temperature loss\n180g * 4.2 J/g K * dT = 33300 J => dT = 44.0 degrees\n\nConclusion we need only to melt 100g * 30/44 = 68.1 gram of ice to cool down the water to zero degree. 31.9 grams of ice remains.\n\n3) 1) Calculate the heat needed to melt 50 grams of ice completely: \nMass of ice * Heat of Fusion\n50g * 333J/g = 16650 J\n\n4) Calculate the cooling we can obtain \nMass of water * specific heat of water * temperature loss\n180g * 4.2 J/g K * dT = 16650 J => dT = 22.0 degrees\n\n5) Calculate the average temperature of the water.\nAfter melting of the ice we have 50 g of water at 0C and 180 g of water at 30-22=8C. This average out to 6.3C
23033
If you were able to get the salt solution cold enough, it would freeze. However, if you put two ice trays side by side, one filled with water, the other filled with salt water, and chilled them to the point where both froze, the would both be the same temperature. However, once the cold was taken away, the salt solution would melt at a much lower temperature than the water only cubes.\n\nWhat salt does when added to water is decrease the temperature at which water will freeze -- as well as melt. How much the freezing/melting point is lowered depends on how much salt is added. The higher the concentration, the lower the freezing/melting point.