States that particles of reactants collide with a certain minimum kinetic energy
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Enthalpy profiile
A diagram to show how the enthalpy changes as a reaction proceeds
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Activation enthalpy (Ea)
The minimum kinetic energy required by a pair of colliding particles before a reaction will occur. The energy that must be supplied to enable the bonds in the reactants to stretch and break as new bonds form in the product.
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Dynamic equillibrium
When the rate of forward reaction is equal to the rate of backwards reaction; the rate of reactants being converted into products is equal to rate of products being converted into reactants
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Le Chatlier's principle
States that if a system is at equilibrium and a change is made in any of the conditions, then the system responds to counteract that change as much as possible
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Greenhouse effect
The process in which the absorption and subsequent emission of infra-red radiation by atmospheric gases warms up the lower atmosphere and the planets surface
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Homogeneous catalyst
A catalyst in a different physical state to the reactants that works by forming intermediate compounds with the reactants
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Radicals
A species with one or more unpaired electrons
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Heterolytic fission
Both the electrons in the shared pair go to just one of the atoms when the bond breaks, forming Ions
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Homolytic fisson
One of the two electrons in the shared pair goes to each of the atoms, leaving both the atoms with an unpaired electron, forming radicals
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Photodissociation
When molecules absorb ultra violet radiation at the right frequency to split the molecule apart
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Other cards in this set
Card 2
Front
A diagram to show how the enthalpy changes as a reaction proceeds
Back
Enthalpy profiile
Card 3
Front
The minimum kinetic energy required by a pair of colliding particles before a reaction will occur. The energy that must be supplied to enable the bonds in the reactants to stretch and break as new bonds form in the product.
Back
Card 4
Front
When the rate of forward reaction is equal to the rate of backwards reaction; the rate of reactants being converted into products is equal to rate of products being converted into reactants
Back
Card 5
Front
States that if a system is at equilibrium and a change is made in any of the conditions, then the system responds to counteract that change as much as possible
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