at what temperature does glass melt?
353454
Depending on it's composition, it can have a melting point of about 1400-1600 °C. However, there are glasses that will melt at lower temperatures but those are not common among commercial nor industrial usage.
288276
ρwater ~ 1g/ml\n\nq = 1000g x 4.18J/ºC.g x (37ºC-0ºC) = 155.660kJ (1.6x10^5J to correct Sig Figs)\n\nsecond part. The amount of heat required in part 1 will melt 155.660kJ / 6.01kJ/mole = 25.9 moles of ice or 468g
1124592
If we put two smooth glasses together (without glue them), normally what is the distance in between? \nIn an ideal situation, let's say the two glass surfaces are perfectly smooth and 100% flat, and we superpose one of them onto the other, there should be an uniform distributed air-layer between the two pieces of glasses even though it looks we put them in direct contact, so what is the thickness of this air strip? round 10nm? or more than 1 μm?\nAny guess is welcomed :)\n\n\nif ur mentioning that it is an ideal situation - glass 100% smooth etc. then it is stupid of u to ask such a question. \n\nThere wud b no air gap b/w them.\n\n(ur quest included so u may not modify it later)\n\n\nArchitectural glass is made from three principal raw materials, easily found in nature: silica, lime and sodium carbonate.\nAvg size of molecular terrain would be approximately 300 - 3000A. (neglecting secondary composition of glass). Thus logically this has to be the thickness of this strip of air.
20570
Mercury is a liquid at room temperature but can be changed to a solid if cooled to a low enough temperature or changed to a gas if heated to a high enough temperature.  This is similar to ice, water and steam but at different temperatures.\n\nIf we start with ice kept well below freezing, we can add heat and the ice will rise to the freezing point of water then begin to melt.  Melting occurs because we are adding heat energy to the water molecules which makes them vibrate.  At some point the vibrations are strong enough to break the attractive bonds between the frozen water moleclues which then become liquid.  When the ice is all melted we can add more heat to the water to raise its temperature to the boiling point.  At the boiling point the water molecules are vibrating strongly enough that some of them escape from the surface of the water to form a vapor or steam.  As more heat is added, more molecules escape and the water evaporates.\n\nMany materials, including mercury, exhibit similar solid, liquid and gaseous states depending on the temperature and strength of bonds.
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
579210
Ice freezes and melts at 0 deg Celcius, ice water at about -18 degrees.\n\nWhen ice melts, it goes from ice at 0 deg to water at 0 deg. In the process, absorbs 80 calories of heat per gram of ice. This is known as heat of fusion.\n\nIf you have ice in water, all at 0 deg, there is an equilibrium formed where some of the ice is melting absorbing heat of fusion from the water, and some of the water is freezing giving heat back to the ice. \n\nWhen you add salt to the mixture, the freezing point of the water is depressed below 0, so the heat absorbed from water causes it to cool below 0 rather than being refrozen into ice.
810276
Well, probably easier to explain empirically -- I know that one of the equations that you would be looking for is Planck's law of black-body radiation.  That, along with other equations involved in transport phenomena could be used to model the system and let you know how much heat you lose from the glass.\n\nOff the top of my head, I can't remember every equation that one would want to use.  Good luck!\n\nThe link is to Wiki's entry for Transport Phenomena -- the first reference there would be an excellent -- if very heavy on the math -- reference for solving this problem.
1140288
B. 93.3\n\nThis will help you:  http://www.onlineconversion.com/temperature.htm
867788
Liquid.  Melting point is 600.65K
454982
A crystal shape is the arrangement of the molecules in a compound...carbon fiber is a crystalline structure since it is arranged in a pattern when observed under a microscope. Glass, however isn't a crystalline structure, and will be disorganized. Also, a quick fact is that glass will always be in motion due to it's non-crystalline structure. The bottom of a pane of glass will be thicker than the top after many years :) A high melting point means that it will take more heat to induce a state change... Metal is frozen at room temperature and has a high melting point, as opposed to water, which has a melting point around 33 degrees farenheit.
440521
no it is not safe to assume ice is at 0C.  0C is just the temperature where ice freezes/melts.  If you were to place ice into a -80C freezer the ice's temperature would be -80C.  For calculating heat...the ice must be heated to 0C then break the enthalpy of fusion (melt a solid), then heated to 100C, break enthalpy of vaporization(evaporate a liquid), then heat till the final temperature. So in the end it is not safe to assume ice is at 0C.
1014247
there are different tempuratures to melt gold and copper,for instance gold is a softer metal and it will melt before the copper.say the temp for melting gold is 1000 degrees,and copper is 1200 degrees,the gold will melt first.
800137
Stained glass makers use 60/40 solder, which means 60% tin and 40% lead, has a lower melting point so it doesn’t require as much heat. \n\n--> http://www.delphiglass.com/soldering-items/solder/mastercraft-60-40-solder-1-lb.html
212537
Well considering temperature is just a measure of the speed of the particles moving in a substance, the lowest temperature would be where there is no motion in the particles of a substance. This is called absolute zero which is measured as −459.67°F. This has never been acheived by scientists but they have come to within several thousanths of a degree away from it.
503889
Glass:\namorph structure (not cristaline)\ncasant\nan melted mixture of Na2O, SiO2, K20\ntransparent\ninsipide\n\nSalt:\ncristaline structure - cubic system\nNaCl - natrium chloride\ntranslucid\nsalty taste
382860
Melting point -11°C (262.15 K) \nBoiling point 150.2°C (423.35 K)
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.