Does Aluminum have a higher specific heat than copper? and why?
83741
Aluminum: 900 J/kg/K\nCopper: 380 J/kg/K\n\nSo, yes. Aluminum has a higher specific heat and therefore a higher "amount of heat [is] required to change a unit mass of [aluminum] by one unit of temperature [than copper]." Why? Since specific heat is related to the excitation of the atoms and how well they hold heat, I would guess aluminum atoms bind to each other tighter and resists an increase in atomic motion (which would appear to us as an increase in temperature).
404624
Well, Copper always has 29 protons, otherwise it wouldn't be copper. Metallic copper has 29 electrons, because it isn't an ion. Therefore, to have that +2 charge, it must have 27 electrons (29 protons + 27 electrons = +2 charge).
570003
about the two are mentioned, both are found in the body, but the excess is dangerous with less amount of magnesium than aluminum. have you mentioned other?
940458
Of the ones you listed Aluminum would be the best mostly because it is a metal.
723937
copper. because it can oxidize easier. That is why statue of liberty is green.
572288
Copper is malleable any temperature above about -50C..certainly at room temperature, so I'm not sure what you mean by that question- It has a relatively high melting point (about 1100 C), but does not need to be hot to be worked.
628622
Heat sinks are commonly made of a good thermal conductor such as copper or aluminum alloy. Copper is significantly more expensive than aluminum but is also a better thermal conductor. Aluminum has the significant advantage that it can be easily formed by extrusion, thus making complex cross-sections possible. The contact surface of a heat sink must be flat and smooth in order to ensure the best thermal contact with the object to be cooled. Sometimes a thermally conductive grease is employed to ensure the best thermal contact, such greases often contain colloidal silver (an even better thermal conductor than copper.)
1030054
You would find, if you had a sensitive enough measuring system, that the energy is dispersed through the acid as heat. \n\nWhen acid oxidises metal there is an initial activation energy required to break the metal lattice and that energy nromally comes from the heat already in the system. When the lattice is under stress sit requires far less energy to break down and the activation energy is lower. That means that more heat is retained by the system as heat.\n\nYou can see for yourself that a metal lattice under stress breaks down and oxidises more readily by simply bending an iron nail and dropping it in a few mm of salt water for a few days. The iron will rust almost exclusively where it was bent. That is because the  bend represents a point of stress in the lattice.\n\nWith less energy required to break down the metal alttice the overall reaction becomes more energetically positive and the amount of heat in the system increases.\n\nThe amount of additional heat this represents is tiny, but with an incredibly stable atmosphere and a very sensitive thermometer you would regeister the lost energy as a higher temperature than an identical beaker of acid with an uncompressed spring.
835942
Alright, I looked up the history of the spelling of Aluminum.  We Americans don't, in truth, spell it incorrectly.  There are simply two variant spellings.  See below:\n\n"Etymology/nomenclature history\nThe earliest citation given in the Oxford English Dictionary for any word used as a name for this element is alumium, which Humphry Davy employed in 1808 for the metal he was trying to isolate electrolytically from the mineral alumina. The citation is from his journal Philosophical Transactions: "Had I been so fortunate as..to have procured the metallic substances I was in search of, I should have proposed for them the names of silicium, alumium, zirconium, and glucium." [11]\n\nBy 1812, Davy had settled on aluminum, which, as other sources note, matches its Latin root. He wrote in the journal Chemical Philosophy: "As yet Aluminum has not been obtained in a perfectly free state."[12] But the same year, an anonymous contributor to the Quarterly Review, a British political-literary journal, objected to aluminum and proposed the name aluminium, "for so we shall take the liberty of writing the word, in preference to aluminum, which has a less classical sound." [13]\n\nThe -ium suffix had the advantage of conforming to the precedent set in other newly discovered elements of the period: potassium, sodium, magnesium, calcium, and strontium (all of which Davy had isolated himself). Nevertheless, -um spellings for elements were not unknown at the time, as for example platinum, known to Europeans since the 16th century, molybdenum, discovered in 1778, and tantalum, discovered in 1802.\n\nAmericans adopted -ium for most of the 19th century, with aluminium appearing in Webster's Dictionary of 1828. In 1892, however, Charles Martin Hall used the -um spelling in an advertising handbill for his new electrolytic method of producing the metal, despite his constant use of the -ium spelling in all the patents he filed between 1886 and 1903. Hall's domination of production of the metal ensured that the spelling aluminum became the standard in North America; the Webster Unabridged Dictionary of 1913, though, continued to use the -ium version.\n\nIn 1926, the American Chemical Society officially decided to use aluminum in its publications; American dictionaries typically label the spelling aluminium as a British variant"
95862
it gets hot, which in turn causes more resistance, and it gets even hotter, which causes more resistance.  if there are enough amps, the metal will melt.
20778
The basic rule of thumb is any metal.  Silver, gold, iron, copper, and aluminum are a few examples.  Copper is commonly used in electrical wiring because it is durable, inexpensive, and easy to bend.  \n\nAs previous stated, the "gold connectors" on your cables provide very little help.  In pure definition, they conduct electricity more efficiently than copper.  However, the cost delivers little results unless you are investing $50,000 in your home theater sytem.  Then you might tell a difference.\n\nHope it helps!
1050458
Metals have a much higher thermal conductivity than similar non-metals.  This is because, in addition to the transport of heat by atomic vibration, heat is also carried very efficiently by the mobile electrons.  The electrons in a metal create something called an electron gas, and this gas actually has a temperature.  The electrons in this gas are free to move around carrying heat with them, and the electron gas heats the bulk of the metal.\n\nNote that it is not the individual electrons which are "hot", it is the statistical properties of huge numbers of electrons all moving at once that leads to us calling the electron gas "hot".  In a hot electron gas, some electrons are in a higher energy state than they need to be because there are empty quantum states at lower energies that can accept them.  The electrons can drop into those states by giving up some kinetic energy to an atomic nucleus, effecitvely injecting heat into the system at that point.  When you heat up one part of the metal, that heat kicks electrons out of their lowest energy states, making a hole that another electron can drop into, and the effect is that heat is moved from one part of the metal to another.\n\nNon-metallic solids do not have this electron gas conduction mechanism, so thermal conductivity in those substances is generally much lower.
360182
Heavy Metal! Just joking. http://www.scienceproject.com/projects/intro/elementary/EX057.asp Go here, they have a lot of information.\n\nhttp://www.science.ca/askascientist/viewquestion.php?qID=1216 And this one. It is clear that aluminum conducts the best heat.
649898
No, that is not true.  If you have a more dense metal, it may take more energy to heat it up, but that is because there is more mass.  Water has a very high specific heat, but it is definately less dense than metals.  I believe specific heat is determined by quantum mechanical properties.
1154066
It is not due to the chemistry of copper or gold.\n\nIt is due to the electronic band structure. The two metals unusually have a band structure that causes them to absorb light at certain frequencies rather than reflecting it.
43501
Its a Metal, hence responds to / is a conductor of heat.\n\nIts fluid so the expansion per gradient of heat would be highest.\n\n\nAll other liquids are not a conductor of heat ( or as good as mercury)
754186
Lacking more detail - my suspicion is that the release of H2 will cause the amount of aluminium to be to high...\n\n-dh