HELP PLEASE ;)
you see a bright flash and then flames during a class demonstration, is this an example of a physical change or a chemical change. Explain.
2007-04-25 01:07:05 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
this is a chemical change
cause the substance is burning
that means its reacting with oxygen to form oxide
2007-04-25 01:15:15 · answer #1 · answered by SuNiL 3 · 1⤊ 0⤋
It is an example of a chemical change in that fire is an oxidation reaction.
It is also an example of a physical change: if the bright flash and then flames were not the intended result of the experiment as approved by your teacher, the student responsible will be displaced from the science room to the office to explain to the principal why he tried to blow up the science lab.
2013-12-17 09:21:44 · answer #2 · answered by Anonymous · 1⤊ 0⤋
It is a chemical change one reactant react with oxygen and form another compound.
as
reactant+O2 --------> oxidized product+heat+light
and physical change is the change in physical property as shape, energy etc
2007-04-25 01:27:59 · answer #3 · answered by sunny 2 · 0⤊ 0⤋
Anytime something burns, it is a chemical change. The process is called oxidation.
2007-04-25 01:14:50 · answer #4 · answered by JOhn M 5 · 0⤊ 0⤋
i can explain this
flash is due to release of large amount of energy..which is in the form of heat and light...
flames are due to gases produced during chemical change..
u must be knowing why this energy is releasing
2007-04-25 01:22:13 · answer #5 · answered by manigoal 2 · 0⤊ 0⤋
if there is achange in the physical appearance of the substance it is physical change, if there is a change in the chemical structure of the substance it is chemical change
2007-04-25 01:44:41 · answer #6 · answered by Jeniv the Brit 7 · 0⤊ 0⤋