Which is the chemical change? burning magnesium or melting a candle?
2006-10-26 11:37:58 · 12 answers · asked by Katie G 2 in Education & Reference ➔ Homework Help
Burning magnesium changes the magnesium into magnesium oxide, which is a chemical reaction (oxidation). MELTING a candle (not burning it) only changes the state of the candle from a (semi) solid to a liquid, and does not involve a chemical change. The wax is still wax when you're done, it's just liquid. BURNING the candle, on the other hand IS a chemical change, just like the magnesium burning.
2006-10-26 11:42:27 · answer #1 · answered by mcmustang1992 4 · 0⤊ 0⤋
Burning magnesium is a chemical reaction. Melting a candle isn't because nothing in the chemical make up of the candle is changing...it's just a physical change.
2006-10-26 11:47:33 · answer #2 · answered by Ainsn 1 · 0⤊ 0⤋
Burning magnesium becuase a chemical change is a change that occurs when a substance changes composition by forming one or more substances. A melting candle does not do that.
2006-10-26 11:46:55 · answer #3 · answered by martinashasha 2 · 0⤊ 0⤋
Both are chemical changes. Burning magnesium produces heat and carbon dioxide and other harmful vapors. Burning a candle produces heat and releases carbon dioxide. Any time a chemical or substance changes from its original form to a different form a chemical change takes place.
2006-10-26 11:44:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
magnesium since its an element it is a chemical change. a physical change can be a change of state but its still the same , you melt a candle it bacomes wax and back to the hardness of the candle
2006-10-26 11:43:21 · answer #5 · answered by Anonymous · 0⤊ 0⤋
melting a candle is. The reason is that with melting a candle you are just change the state of the candle, where as with burning magnesium you are destroying it.
2006-10-26 11:39:59 · answer #6 · answered by Anonymous · 0⤊ 1⤋
Burning magnesium (heat is absorbed by the magnesium, resulting in a relatively ireeversible change of state)
2006-10-26 11:48:07 · answer #7 · answered by J 2 · 0⤊ 0⤋
burning magnesium causies it to intereact with Oxygen therby changing it. A candle if it only melts the wax doesn't chemically alter the wax just changes its state.
2006-10-26 11:41:55 · answer #8 · answered by Jim7368 3 · 0⤊ 0⤋
Burning Magnesium
because flammability is a chemical change
while melting is physical
any other q's just ask.
2006-10-26 11:39:42 · answer #9 · answered by Rocky 4 · 0⤊ 0⤋
burning magnesium!
2006-10-26 11:39:08 · answer #10 · answered by Eugene 4 · 1⤊ 0⤋