Hi, I'm a yr8 person in ks3 and this is my hw: What happens when a candle is alight? I have to answer these q's.
Identified a physical change that occurs when the candle is burnt
Identified a chemical change that occurs when the candle is burnt
Described one difference between a physical and a chemical change
Named the reactants and the products of the chemical reaction
Correctly written a simple word equation for the chemical reaction
I have to hand this piece of work in by Thursday 3rd of July.
I've also got this on the sheet to help me.
Wax contains hydrogen and carbon particles.
I've done some of it and I think I've done it right,
A physical change: the wax starts to melt
A chemical change: light and heat energy is produced
The difference between chemical and physical changes are that you can measure and see physical changes whereas you can't for a chemical change.
For the reactants, is it
hydrogen + oxygen equals water
carbon + oxygen equals carbondioxide
???
Thanks!
Bye!