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5 October, 04:37

Write two-step equations to describe the changes of state that take place when a candle burns.

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  1. 5 October, 07:30
    0
    Chemical reactions are happening everywhere. Chemical reactions in your body digest food, decay your teeth and much more. Chemical reactions occur in batteries to provide electricity, in the oven when you bake a cake, in your hair when it is bleached or coloured, and in your car when it burns fuel.

    Explosions are very fast chemical reactions.
  2. 5 October, 07:36
    0
    In a burning candle, there are both physical and chemical changes. The melting of the solid wax to form liquid wax and the evaporation of liquid wax to form wax vapour are physical changes. The burning of the wax vapour is a chemical change.
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