Topic Exothermic and endothermic reactions Level

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Exothermic and Endothermic Reactions

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Topic Exothermic and endothermic reactions Level GCSE (or any course for students aged 14-16) Outcomes To understand the terms exothermic and endothermic To understand that breaking bonds requires energy and making bonds releases energy www.thescienceteacher.co.uk | resources for science teachers who like to think

Where would the products go on this energy level diagram? Energy (joules) Reactants (Fuel + oxygen) Progress of reaction

products fuel combustion exothermic heat energy enthalpy surroundings The men in the picture are warming themselves by the fire. Can you use the words below to explain why burning wood releases energy. products fuel combustion exothermic heat energy enthalpy surroundings reactants

The snow on the mountain is melting. Is this an endothermic process? No, it must be exothermic because when we melt ice the temperature goes up. You break bonds in exothermic reactions… Yes, because energy is needed to break bonds between the water molecules.