Toffee with a fizz – simple to make but can you explain the Chemistry?
Put two tablespoons of golden syrup and 3 tablespoons of sugar into a pan, heat the mixture gently until it all melts and then gently bring it to the boil. Simmer for around 5 minutes and then add a large tablespoon of bicarbonate of soda to the mixture. It will foam and froth up.
Heat is a bit like time – it only flows in one direction. From heat’s point of view it flows from hot to cold.
Here is a dead simple experiment to show this – and it contains some good IB Chemistry as well.
Students love new trends and we have one just starting in our school that has origionated from some lessons (not mine!) on endo and exothermic reactions.
The trend is handwarmers …… and it’s not even that cold!
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