Suppose you take some ice from the freezer, put it in a pan, and heat the pan gently on the stove until the ice melts. Is this a chemical or a physical change?
chemical
physical
2007-11-10 09:12:48 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It is physical. It is still water but it has changed phase from solid to liquid.
2007-11-10 09:16:18 · answer #1 · answered by Rich Z 7 · 4⤊ 0⤋
Chemical change is a change in the chemical's type/molecule. For instance, if you burn hydrogen gas with oxygen, it's a chemical change, because you start off with 2 chemicals (H2 and O2) and end up with an entirely different molecule (H2O). Since it's a change in the molecule, that's chemical.
A physical change is the change in the state of the same chemical/solution/etc. So, in this case, it starts and ends as water, just changes how the water interacts with other water molecules... either "standing still" ie frozen, or moving slowly and sticking together IE liquid, or running around the air like headless chickens :P IE gas.
So in this case, physical
2007-11-10 17:24:36 · answer #2 · answered by Khana S 3 · 1⤊ 0⤋
Rich Z is correct, it is a physical change. Watter still maintained its molecular formula of H2O, it just changed its physical state from solid to liquid.
2007-11-10 17:19:23 · answer #3 · answered by ryan w 3 · 2⤊ 0⤋
hottie14 is wrong..
its a physical...
because if you put it back in the freezer it is going to look the exact same(ice)
2007-11-10 17:21:27 · answer #4 · answered by cjb330 3 · 2⤊ 0⤋
that is a chemical change. so you must be in grade nine. i just learned about that.
2007-11-10 17:16:16 · answer #5 · answered by hottie14 1 · 0⤊ 6⤋