What happens when a candle is alight (on one side we had to show physical change and on other side the chemical change). The question sheet says 'Explained both changes using the Big Idea of Energy.'
The physical changes are what you can see, and what you can measure. Include heat.
The chemical changes: liquid wax changing to light, smoke, heat?
You need to explain these
Thankyou for your help but what is the Big Ideas of Energy"? Can you explain please?
See my response to Melody near the top of this page.
That's great, thanks.
When a candle burns the wax melts ( a physical change). Some of the melted wax changes into gas which burns with the flame. This is a chemical change.
when a physical change happens, it is visible
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im doing the same project!
does the rope burn too when it is lighted..
im doing this project too its a levelled assessed task and i needed help is that cheating?!!
a physicalchange is the wax melting and a chemical change is the hydrogen and carbon removed. im doing the same project too
-Im probably not the samee 1 as yooh but im doing a h/w task on this *groans*
-Physical'change: Thee Heat from the flame burns the wax, which melts into a liquid, running down the side of the candle.
-Chemical'change: The wax is heated so much it turns to a liquid; which runs down the side of the candle.
Somee of it hardens at the bottom (i.e. if the candle is on a plate, or surface of somethink), Buh some of the liquid wax turns into the gases: hydrogen and carbon - 'cause there are hydrogen &+ carbon paticles in the wax.
These gases then burn with the flame.
Hopee youuh findd this info helpfuul
x
youmum
a chemical change is when you cant see it hope this was helpful
join the club i was stuck on this homework aswell...