The copper wire glows red. Once it cools...the copper reacts with the air to produce copper(II) oxide. This is shown by the black tarnish on the copper wire.
If heated in a vacuum the mass of a piece of copper would not change until it started to boil off. In an atmosphere of oxygen or other reactive gas, chemical changes might cause a change of mass as gas is absorbed.
You will not detect any change in the mass of copper as a result of heating it, although in theory, there is a very slight increase in mass which results from adding heat energy, in accordance with Einstein's famous equation, e = mc2.
the mass will be increased because the oxygen will be added in a chemical reaction to form copper II oxide.
Cu (s) + O2 (g) >>>> CuO (s)
its the same. you cant create or destroy mass
If you are heating copper pieces, they will turn from brown then to a greenish sort of colour then black.
The mass decreases because
copper carbonate (heat)--> copper oxide + carbon dioxide
hope this helps all you people who are stuck :)
The mass stays the same.
Melting is a physical process and not a chemical reaction, and so there will be exactly the same amount of copper after menting as before.
Copper is transformed in copper(II) oxide - CuO.
No Reaction Occurs (:
the partcles get closer together or the particles get bigger. you decide
it goes all white and puffy because the copper replaces the silver in the solution
It will bend eventually because u have heated it up so much it wouldn't be able to function It becomes molten like the lava in the earth.
The copper wire glows red. Once it cools...the copper reacts with the air to produce copper(II) oxide. This is shown by the black tarnish on the copper wire.
The black coating you see is a coating of copper oxide, which forms when the hot metal reacts with air. no air can reach the inside, so it does not react to form black copper oxide.
You answered your own question with "as the metal expands." The gap stays proportionally the same, because the whole piece of copper expands when it is heated. It isn't relevant that someone cut out a piece of it, because the copper is completely unaware of this. It expands because you heated it, causing its atoms to move apart. This expansion occurs everywhere in the copper, but obviously not in the gap (there's nothing there but air). You may be thinking something like, "Well then the copper must close the gap," but you have to remember that ALL of the copper expands. You get a bigger version of what you had before you heated it. Tight pipe and machinery fittings are accomplished using this method. Heat it to expand, cool it to shrink.
contracts (get smaller)
no it wont because copper is not a type of magnet even though it is a metal
No Reaction Occurs (:
If a person ties a piece of copper wire at the end of the exhaust pipe on a vehicle the copper is going to heat up. When the copper heats up it will turn a rainbow of colors.
Any piece of copper heated will do the same thing. When heated, the colored coating on the copper is called "scale," and consists of a thin layer of copper oxide on the surface of the copper. Depending on the thickness of the layer and its temperature, the scale can be some very interesting colors, such as red, blue, brown, and pink.
the partcles get closer together or the particles get bigger. you decide
Thermal energy will move from the hot to the cold until their temperatures are identical.
14KB hallmark is a 14K gold plated metal piece. The base metal would be something such as steel or copper, but certainly not of a metal of significant value.
contracts (get smaller)
Not enough information is provided to answer the question.