Write any 4 properties of chemical change
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The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
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The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.
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