science 0.0 / 5 ? Otherchemical reactions GCSENone Created by: Isabella SofiaCreated on: 17-05-18 10:15 what is a chemical reaction? give examples a change in which atoms are rearranged to go create new substances eg combustion 1 of 10 2 differences between chemical reactions and physical changes chemical reactions are not reversible. physical changes are. chemical reactions transfer energy physical changes don't 2 of 10 what is meant by endothermic reaction a chemical reaction that transfers energy from the surrounding 3 of 10 what is an exothermic reaction a chemical reaction which transfers energy to surroundings 4 of 10 what happens to particles in a chemical reaction they get rearranged in a different way 5 of 10 explain the law of conservation of mass In any chemical reaction the total mass of reactants the total mass of reactants = the total mass of the products 6 of 10 what is meant by thermal decomposition when a substance breaks down on heating 7 of 10 what is a decomposition reaction a chemical reaction in which a compound breaks to form simpler compounds and for elements 8 of 10 4 signs of chemical reaction flames or sparks, new smell, temperature changes, fizzing or popping 9 of 10 what is meant by physical changes a reversible change in which no new substances are made eg. changes of state/ dissolving 10 of 10
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