Question

1. A fire is heating up a pot, which is cooking food. Which part of this reaction is the chemical reaction system?

Answer 1

2. When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.

3. A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.

4. Energy is never created but simple recycled and changed into other forms.