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Topic: Melting


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In the News (Fri 14 Jun 19)

  
  Melting Point - The south’s new intimate music venue
Please go to our blog to post your comments and let us know what bands or other type of entertainment that you would like to see at The Melting Point.
The Melting Point is an intimate concert venue located in the beautiful Foundry Park Inn and Spa in Athens, Ga - widely known as the live music capital of the Southeast.
With impeccable sound and an aggressive booking strategy, The Melting Point will play host to the very best musicians in the nation and offer patrons a unique, front row listening experience.
www.meltingpointathens.com   (236 words)

  
  CHM 235L - Exp. 1 Melting Points
Substances melt throughout a tempera­ture range in which both the solid and liquid phases of the substance coexist in a state of equilibri­um.
The melting point of the mixture will be identical to that of the known compound in the first instance or lowered and much broadened in the latter.
Melting point capillary tubes are placed (closed end down) in the slots directly in front of the thermometer and are viewed through the magnifying lens.
jan.ucc.nau.edu /~jkn/235L1-MeltingPoint.htm   (1659 words)

  
 Melting Summary
Melting is the opposite change, from a solid to a liquid as the temperature increases.
Melting is also called fusion, and the energy required to bring about this change of state is called the heat of fusion or the enthalpy of fusion.
In physics, melting is the process of heating a solid substance to a point (called the melting point) where it turns liquid.
www.bookrags.com /Melting   (1533 words)

  
 Melting Point
The melting point of a substance is the temperature at which the solid phase converts to the liquid phase under 1 atmosphere of pressure.
The melting point is one of a number of physical properties of a substance that is useful for characterizing (describing) and identifying the substance.
To measure the melting point of a substance, it is necessary somehow to gradually heat a small sample of the substance while monitoring its temperature with a thermometer.
www.wpi.edu /Academics/Depts/Chemistry/Courses/General/meltingpoint.html   (907 words)

  
  Basic Tests for Pharmaceutical Dosage Forms: 4. Determination of melting characteristics
The expression "melts about..." means that the temperature at which the substance is completely melted, as indicated by the disappearance of the solid, will be in the range ± 4°C from the stated value, unless otherwise indicated.
The melting point denotes the temperature at which the substance has just completely melted; this is indicated by the disappearance of the solid phase and complete transparency of the melt.
Another method of checking the accuracy of the thermometer is by measuring the melting points of a set of WHO melting-point reference substances using a 1-mm capillary; if the observed melting points of the reference substances lie within ±2°C of the melting temperature indicated for that substance, the thermometer may be considered satisfactory.
www.who.int /medicinedocs/library.fcgi?e=d-0edmweb--00-1-0--010---4----0--0-10l--1en-5000---50-about-0---01131-0011cbMB3ocm9ee80ca70000000044c8ab49-0utfZz-8-0-0&a=d&c=edmweb&cl=CL2.1.1&d=Jh1794e.4   (1542 words)

  
 Measure Melting Point   (Site not responding. Last check: )
The melting point of a pure substance is defined as the temperature at which the solid and liquid phases are at equilibrium at 1 atmosphere of pressure.
Melting points are used to identify a substance and assess their purity.
The melting point of a pure substance is a unique property of that substance.
www.kolias.com /science/meltingpoint.htm   (447 words)

  
 Is Antarctica melting because of global warming ?   (Site not responding. Last check: )
Scientists are convinced that the Earth is warming due to recent changes in the composition of the atmosphere that contribute to the "greenhouse effect".
Most melting is unseen because it occurs at the underside of icebergs as they drift away from the continent, or at the underside of the floating ice shelves.
Melting is an essential part of the glaciological cycle that starts as the fall of snow over the continent and ends by melting.
www.antarctica.ac.uk /About_Antarctica/FAQs/faq_02.html   (390 words)

  
 Global Melting
This global melting is an early and obvious sign of climate change, but its implications go far beyond merely losing snow and ice.
The melting of land ice is already raising sea levels.
Then there is the chance that melting ice will cause a feedback effect due to the fact that snow and ice reflect more sunlight than bare ground or water so less ice means more warming (which melts more ice, etc.).
www.greenpeace.org /china/en/campaigns/stop-climate-change/impacts/global-melting   (168 words)

  
 NRDC: Global Warming Puts the Arctic on Thin Ice
The melting of once-permanent ice is already affecting native people, wildlife and plants.
When that covering melts, the earth absorbs more sunlight and gets hotter.
Melting glaciers and land-based ice sheets also contribute to rising sea levels, threatening low-lying areas around the globe with beach erosion, coastal flooding, and contamination of freshwater supplies.
www.nrdc.org /globalWarming/qthinice.asp   (907 words)

  
 BBC NEWS | UK | Antarctic's ice 'melting faster'
Melting in the Antarctic Peninsula removes sea ice that once held back the movement of glaciers.
Over the past five years, studies have found that melting Antarctic ice caps contribute at least 15% to the current global sea level rise of 2mm (0.08in) a year.
It is not known whether the melting is the result of a natural event or the result of global warming.
news.bbc.co.uk /1/hi/uk/4228411.stm   (388 words)

  
 Melting Point Study Questions - Answers
The melting point of such a compound needs to be taken in a sealed capillary tube.
To obtain an accurate melting point value, the device must be heated slowly near the melting point in order for the thermometer's sensor to be the same temperature as the heating block.
True melting is taken as the first appearance of liquid within the bulk of the sample.
orgchem.colorado.edu /hndbksupport/meltingpt/mpsqans.html   (1022 words)

  
 Stories Tagged 'melting' » Netscape.com
Science – Arctic sea ice is melting at a significantly faster rate than projected by even the most advanced computer models, a new study concludes.
Science – Aboriginal communities in Ontario's far north are becoming increasingly isolated as rising temperatures melt their winter route to the outside world and impede their access to supplies.
Science – Arctic sea ice in winter is melting far faster than before, two new NASA studies reported Wednesday, a new and alarming trend that researchers say threatens the ocean's delicate ecosystem.
www.netscape.com /tag/melting   (488 words)

  
 NASA - The Arctic Perennial Sea Ice Could Be Gone by End of the Century
Melting sea ice would not affect sea levels, but it could profoundly impact summer shipping lanes, plankton blooms, ocean circulation systems, and global climate.
It is instead absorbed into the oceans and land, raising the overall temperature, and fueling further melting.
Comparing the differences between Arctic sea ice data from 1979 to 1989 and data from 1990 to 2000, Comiso found the biggest melting occurred in the western area (Beaufort and Chukchi Seas) while considerable losses were also apparent in the eastern region (Siberian, Laptev and Kara Seas).
www.nasa.gov /vision/earth/environment/Perrenial_Sea_Ice.html   (768 words)

  
 Melting Point, Freezing Point, Boiling Point
In theory, the melting point of a solid should be the same as the freezing point of the liquid.
When this solid melts, the sodium acetate dissolves in the water that was trapped in the crystal to form a solution.
Because it is difficult to heat solids to temperatures above their melting points, and because pure solids tend to melt over a very small temperature range, melting points are often used to help identify compounds.
chemed.chem.purdue.edu /genchem/topicreview/bp/ch14/melting.php   (913 words)

  
 The Importance of a Melting Point   (Site not responding. Last check: )
The purpose of this laboratory exercise is to introduce the concept of the melting point of an organic compound as a first step in chemically identifying that compound.
With a pure substance, a melting point is the quickest and most accessible method for an organic chemist to confirm the identity of a compound (though in all fairness, NMR is the method of choice due to the proof of identity it provides as well as other information it gives).
Once the two pure melting points have been determined find a partner and together prepare 3 samples: one of 1:9 urea : cinnamic acid, one of 1:1 urea:cinnamic acid, and one of 9:1 urea : cinnamic acid.
www.owlnet.rice.edu /~chem217/MeltingPt.html   (861 words)

  
 Climate warning as Siberia melts - earth - 11 August 2005 - New Scientist
The sudden melting of a bog the size of France and Germany combined could unleash billions of tonnes of methane, a potent greenhouse gas, into the atmosphere.
The warming is believed to be a combination of man-made climate change, a cyclical change in atmospheric circulation known as the Arctic oscillation, plus feedbacks caused by melting ice, which exposes bare ground and ocean.
Then as the permafrost begins to melt, water collects on the surface, forming ponds that are prevented from draining away by the frozen bog beneath.
www.newscientist.com /article.ns?id=mg18725124.500   (715 words)

  
 Melting Point Sample Preparation
The melting point (mp) is a physical property of a substance.
Melting points are often given in lab handbooks as single temperatures.
The melting point is found by slowly raising the temperature of a small sample of solid.
www.csi.edu /ip/physci/faculty/rex/MPMain.HTM   (318 words)

  
 Chem 211 - Melting Point
Melting points may be run from 8 AM to 6PM Monday through Friday only.
The melting point for this compound and any other should really be called a melting range, since the crystals will never melt instantaneously.
The second temperature listed in a melting point is the temperature in where you see the last crystal melt into liquid.
www.wellesley.edu /Chemistry/chem211lab/Orgo_Lab_Manual/Appendix/Instruments/MeltingPoint/melting_point.html   (532 words)

  
 Partial Melting   (Site not responding. Last check: )
Melting commences at grain boundaries, usually where three crystals of minerals with the lowest melting temperatures meet.
Because of mechanical constraints, it is generally believed that at least 1-5% melting is required for the melt to separate from the unmelted (refractory) solid (crystalline) material.
Melting probably never exceeds 35% because of the gravitational instability of low density liquid with higher density refractory minerals.
www.geo.ua.edu /volcanology/lecture_notes_files/partial_melting.html   (170 words)

  
 MELTING homepage
MELTING is a free program (free as in freedom).
MELTING is licensed under the GNU General Public License.
If you use MELTING as an invisible module of your program, behind a common interface, this program HAS TO BE released under the GNU General Public License.
www.ebi.ac.uk /~lenov/meltinghome.html   (393 words)

  
 Wilton: Candy: Melting Candy
Candy Melts are also known as confectionery coating or summer coating.
Melted Candy Melts are ready for molding when the texture resembles cooked pudding.
If you're using the Melting Bottle, fill bottle half full with Candy Melts and microwave at 40% power or defrost setting for a minute, knead gently to mix and continue melting at 15-second intervals until candy is completely melted and smooth.
www.wilton.com /candy/melting.cfm   (517 words)

  
 Melting Point of Butter
Butter is a fatty food extracted from cream that was first produced sometime around 2000 BCE In ancient Rome people used it as hairdressing or skin cream and elsewhere in ancient times it was used as an ointment and medicine.
The point at which butter begins to melt lies between 21 °C and 40 °C. The larger amount of short-chain fatty acids in butter indicates sharpness in the melting curve.
As soon as the butter melts, remove the tube from the water and check the temperature with a thermometer.
hypertextbook.com /facts/2003/JessicaCheung.shtml   (472 words)

  
 Melting Point
Determining the melting point of a compound is one way to test if the substance is pure.
A pure substance generally has a melting range (the difference between the temperature where the sample starts to melt and the temperature where melting is complete) of one or two degrees.
Once a melting point range is determined, prepare another capillary tube (tubes should only be used once and then discarded) and set the MEL-TEMP to the appropriate power level, based on the power level/temperature chart.
wulfenite.fandm.edu /labtech/melting.htm   (530 words)

  
 Edward M Stolper -- Experimental and theoretical studies of mantle melting   (Site not responding. Last check: )
This process is the dominant one by which the mantle melts: parcels of mantle rise adiabatically (or roughly so), and because the solidus is (at least at low pressures) steeper than an adiabat in pressure-temperature space, initially solid materials melt as they decompress and cool.
The key factor in understanding how a mixture of pyroxene-rich lthologies and peridotite will melt (assuming they exchange thermally but not chemically during melting) is that due to their lower melting temperatures, pyroxene-rich lithologies will begin to melt separately and at greater depth than peridotites during decompression melting (see figure).
Some of these are illustrated in the second movie illustrating melting of a mixture of olivine-rich rocks (i.e., peridotite) and pyroxene-rich rocks (i.e., pyroxenite) in a model binary system (this can be compared directly with the movie shown previously for a single lithology source with the same bulk composition).
www.gps.caltech.edu /faculty/stolper/mantle_melting.html   (939 words)

  
 melting point — Infoplease.com
Under standard atmospheric pressure different pure crystalline solids will each melt at a different specific temperature; thus melting point is a characteristic of a substance and can be used to identify it.
The melting point: vanishing glaciers, impermanent permafrost, collapsing ice shelves, rising sea levels.
Melt miscibility in blends of polypropylene, polystyrene-block-poly(ethylene-stat-butylene)-block-polystyrene, and processing oil......
www.infoplease.com /ce6/sci/A0832609.html   (433 words)

  
 melting
Melting is a free program in both sense of the term.
Some perl scripts are provided to show how melting can be used as a block to construct more ambitious programs.
This is the a correction factor used to modulate the effect of the nucleic acid concentration in the computation of the melting temperature.
www.ebi.ac.uk /~lenov/SOFTWARES/melting/melting.html   (2236 words)

  
 The Melting Pot   (Site not responding. Last check: )
On that basis when I spotted a new restaurant, The Melting Pot, in Station Square I figured it might be a place serving ethnic foods from Pittsburgh's various immigrant populations.
The Melting Pot wait staff is trained by the franchise to exacting standards, and I found them to be competent, friendly and knowledgeable.
This might not have been the kind of "melting pot," I expected, but dinner at the Melting Pot is thoroughly delightful.
www.post-gazette.com /pg/04268/384247.stm   (1260 words)

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