chem investigation: hydrogen peroxide decomposition
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7 Terms
3 conditions for reaction to occur
particles must collide
collide with energy equal to or greater than activation energy
be in correct orientation
activation energy
minimum energy required to enter transition state when particles collide
transition state
unstable period where bonds are broken and new ones are formed
exothermic reaction
more energy released to make bonds than absorbed to break bonds
negative change in enthalpy
endothermic reaction
more energy absorbed to break bonds than released to create bonds
positive change in enthalpy
what is a catalyst
substance that increases reaction rate but not consumed in the reaction. provides reactants with an alternative pathway with less activation energy
how does a catalyst work?
particles need certain amount of activation energy to react
catalyst offers path with less activation energy so more particles have enough energy to react
means more successful collisions so reaction speeds up