C8 0.0 / 5 ? FunChemistryFunNone Created by: sotes003.302Created on: 25-02-19 17:28 Collision Theory Reactions only occur when particles collide 1 of 15 Activation Energy The minimum amount of energy required for particles to collide for a reaction to occur 2 of 15 Measuring Rate of Reaction - Mass Decrease HCL and Calcium Carbonate - Measure mass before and after 3 of 15 Measuring Rate of Reaction - Gas HCL and Calcium Carbonate - Measure mass of gas with a gas syringe 4 of 15 Measuring Rate of Reaction - Disappearing X HCL and Sodium Thiosulfate - Measure time for cross to turn invisible 5 of 15 Gradient on Rate of Reaction Graph = Rate of Reaction 6 of 15 Steeper Gradient = Faster rate of reaction 7 of 15 Gradient = dy / dx 8 of 15 What chemical is usually used as a catalyst Transition Metals 9 of 15 Why can't catalysts be used forever They are eventually poisoned despite not being used up 10 of 15 What does a catalyst do Lower the activation energy of a reaction 11 of 15 Endothermic Receives energy from its surroundings - Bond Breaking 12 of 15 Exothermic Energy is given off - Bond Making 13 of 15 What is Dynamic Equilibrium Substances move between states at an equal rate - no overall change 14 of 15 What is Le Chataliers Principal If a change in conditions occurs to a closed reaction in equilibrium, a shift in equilibrium occurs to renew balance 15 of 15
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