Chemistry unit 2 keywords 0.0 / 5 ? ChemistrydefinitionsASAQA Created by: francesca_321Created on: 08-04-15 17:35 Catalyst Increase the reaction rate without being used up 1 of 10 How does a Catalyst work? providing an alternative route or mechanism with a lower activation energy 2 of 10 Activation Energy minimum energy which particles need to collide to start a reaction 3 of 10 Rate of reaction The change in concentration of a substance in unit time 4 of 10 What happens when doubling the concentration or pressure? Double the number of particles per unit volume and double the frequency of effective collisions 5 of 10 Le chatelier's principle If an external condition is changed the equilibrium will shift to oppose the change 6 of 10 1/t the amount of precipitate is fixed 7 of 10 carbon neutral A process or a series of processes in which as much CO2 is absorbed from the air is given out 8 of 10 mean bond enthalpy? the average value of the 9 of 10 enthalpy change Heat change at a constant pressure 10 of 10
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