Chemical Energy

Today we made Chemical energy by making hokey pokey 

http://www.chelsea.co.nz/baking-and-recipes/210/hokey-pokey.aspx

Ingredients

5 Tbsp Chelsea White Sugar

2 Tbsp Chelsea Golden Syrup

1 tsp baking soda

Method

1) Put sugar and golden syrup into a saucepan. 
2) Heat gently, stirring constantly until the sugar dissolves. 
3) Increase the heat and bring to the boil. Boil for two minutes. 
Stir occasionally, if necessary, to prevent burning. 
4) Remove from heat. 
5) Add baking soda. Stir quickly until mixture froths up rapidly! 
6) Pour into a buttered tin immediately. Leave until cold and hard then break into pieces.

The bicarbonate of soda breaks down with heat to release carbon dioxide gas. The gas causes the sugar and syrup mixture froth and  bubble. The bubbles become trapped in the mixture and set there!