C7- energy in reactions Exothermic and endothermic 1.5 / 5 based on 8 ratings ? ChemistryEnergy of reactions/Exothermic and endothermic reactionsGCSEAll boards Created by: sana sheikhCreated on: 18-04-11 11:53 What is an exothermic reaction? Gives out energy as heat 1 of 9 What is an endothermic reaction? Takes in energy as energy and makes temperature fall 2 of 9 What is activation energy? minimum energy needed to start a reaction 3 of 9 What is a catalyst? Sppeds up a chemical reaction without being changed or used up. 4 of 9 HOw does it affect the activation energy of a reaction? Lowers the activation energy 5 of 9 when bonds in a reaction are broken is energy used or made? Used 6 of 9 What is a reversible reaction? A reaction where the product made by the reaction can react to make the reactants 7 of 9 When bonds are made is energy used or made? Made 8 of 9 What is dynamic equilibrium? Where a reaction is taking place in both directions at the same rate and there is no overall effect 9 of 9
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