Kinetics 0.0 / 5 ? ChemistrykineticsASAQA Created by: Joseph FurnivalCreated on: 02-03-18 13:13 What is the activation energy The minimum energy needed for particles to collide and start a reaction 1 of 14 What is the Emp in a maxwell-boltzmann distribution graph Most probable energy it is not the mean energy 2 of 14 What happens to the curve when temperature is increased When temperature increases the curve shifts to the right towards having more molecules with higher energies 3 of 14 At higher temperatures are the curves wider/narrower As molecules have a wider range of energies 4 of 14 What is the rate of reaction The change in concentration of a substance in unit time 5 of 14 What is the unit for change in concentration mol^-3s^-1 6 of 14 What is the initial rate It is the rate at the start of the reaction where it is fastest 7 of 14 What does higher concentrations and pressure do for the reaction There will be more particles per unit volume and so the particles collide with a greater frequency meaning more effective collisions 8 of 14 What happens to the energy curve when concentration increases Curves will be higher because of more particles under the curve however the mean energy is still the same 9 of 14 What does Ea mean Activation energy 10 of 14 What is the effect of increasing temperature in a reaction significantly bigger proportion of particles greater activation energy and more successful and frequent collisions 11 of 14 What is the effect of a catalyst on a reaction Increase reaction rates without being used up they do this by providing an alternative route 12 of 14 what does the area under the curve represent the total number of particles present 13 of 14 At higher temperatures what doe the curve shift to shifts towards more molecules with higher energies 14 of 14
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