Chemistry-Heat Changes 0.0 / 5 ? ChemistryHeat ChangeesOtherAll boards Created by: Katie Howe1Created on: 27-04-17 20:29 What happens in a chemical reaction? Elements/compounds react together to make new elements/compounds 1 of 7 If the energy released is greater than the energy absorbed, what happens? An increase in temperature is observed and heat energy is given out. 2 of 7 If the energy released is less than the energy absorbed, what happens? A decrease in temperature is observed and heat energy is taken in 3 of 7 What is an exothermic reaction? One which gives out heat to its surroundings 4 of 7 What is an endothermic reaction? One which takes in heat from its surroundings. 5 of 7 Examples of exothermic reactions. Neutralisation, hydration, dilution, displacement and combustion. 6 of 7 Examples of endothermic reactions Dissolving, thermal decomposition, photosynthesis, cooking, baking and making an anhydrous compound from a hydrate 7 of 7
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