Is burning a candle an example of a chemical change or a physical change?
Explain. Burning a candle is a chemical change. New substances (carbon dioxide and water) with new properties have been formed Heat and light are produced Change is not reversible The reactants were wax and oxygen. The products are carbon dioxide and water. The reactants are made of different particles with different properties than the products. (Although, just melting wax is a change of state and is therefore a physical change) 19. When bubbles escape from a can of pop is this a chemical change or a physical change? Explain. Bubbles escaping from a can of pop – physical change. Carbon dioxide gas is found in carbonated pop. When the pressure is released, the carbon dioxide comes out of solution. (it was the solute) The bubbles are carbon dioxide-no new substance was produced 20. Is rusting a chemical or physical change? Explain. Rusting is a chemical change. New substances with new properties are produced Colour change Not easily reversible 21. Draw the matter tree (the classificatio
