In Whio for science we have been creating chemical reactions and 

one of them involved  blowing up a balloon!

We used a small plastic bottle, a balloon, baking soda and white vinegar.

  First we put in 10 teaspoons of Baking Soda then we added half a small cup of Vinegar and then Mrs Thomas quickly BUT calmly put the balloon over the nozzle of the bottle and then we watched the Carbon-Dioxide rise up and fill the balloon!!!

  The first time we did it the balloon blew up to the size of a Feijoa, but the second time we used 20 teaspoons of Baking Soda, a bit more vinegar and it blew up to the size of a Mango!!!!

 The balloon felt cold because it was an endothermic reaction. This means the materials absorb energy from around it rather than produce energy ( exothermic).

A question we have now  is;  how much of each material would you need to make the whole thing blow up bigger, or even pop?

By Shannon and Leigh