We were Learning to make a cold air balloon, to make it all we needed to do was get a table spoon of baking soda and put it into the balloon and put a half a cup of vinegar into the bottle and carefully fit the balloon over the neck of the bottle and let the baking soda fall into the vinegar and then watch the balloon inflate.
I found it easy to understand the science behind the experiment.
I found it hard to wait to the next time we do the experiment because we are going to try blow the balloon up!!!
Next time I will try do it at home and at some friends houses as well.
here's a link to check the pro's cold air balloon https://www.youtube.com/watch?v=WIPSlXTnioQHow it works, when vinegar and baking soda mix, an endothermic reaction occurs. This produces carbon dioxide which inflates the balloon. The endothermic chemical reaction will also lower the temperature in the area surrounding the vinegar and baking soda so significantly that you will be able to easily notice the change in temperature.
I really like the way you described how the experiment works and how to do it. you use very scientific words and i hope to comment on another one of your blog post. you are very good scientist, keep up the good work. ka pai
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