When burning or melting a sugar cube, which one would be the chemical change and which one the physical change?
2007-01-22 23:06:45 · 3 answers · asked by rosecrashers1365 2 in Science & Mathematics ➔ Chemistry
When you melt a sugar cube, if it burns then it is considered as burning.
If you change the properties of the sugar then it is chemical, if not then it is physical.
Melting = Physical change
Burning = Chemical change
2007-01-22 23:20:50 · answer #1 · answered by curious~me 3 · 0⤊ 0⤋
In general melting is physical and burning is chemical. With sugar, if the melting of the cube causes a color change to caramel, then it is chemical. If browning occurs you changed the molecule, it can not go back.
2007-01-23 08:04:52 · answer #2 · answered by science teacher 7 · 0⤊ 0⤋
Burning certainly is a chemical change since the sugar will be oxidized producing CO2 and H2O. Melting is a physical change, I guess, since it will resolidify into solid sugar once the heat has been removed..
2007-01-23 07:15:43 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋