· Web viewEffect on Equilibrium Position – relevant to THIS example Reason Increase...
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Rate of Reaction OR Position of Equilibrium? ? 2A (g) + B (g) ↔ C (g) + D (g) ΔH - ve Reactants (3 moles) Products (2 moles) Forward Reaction EXOTHERMIC Change Effect on Rate of Reaction – relevant to ANY reaction Reason Increase Temperature Increase Particles move faster=more collisions that exceed activation energy Decrease Temperature Decrease Particles move slower=less collisions that exceed activation energy Increase Concentration of Reactant Increase More particles per volume = more collisions Decrease Concentration of Reactant Decrease Less particles per volume = less collisions Increase surface area (make particles smaller) Increase More sites for collisions Decrease surface area (make particles larger) Decrease Less sites for collisions Add a catalyst Increase Provides alternative route of lower activation energy = more collisions that exceed activation energy
Transcript of · Web viewEffect on Equilibrium Position – relevant to THIS example Reason Increase...
Rate of Reaction OR Position of Equilibrium? ?
2A(g) + B(g) ↔ C(g) + D(g) ΔH -veReactants (3 moles) Products (2 moles) Forward Reaction
EXOTHERMIC
Change Effect on Rate of Reaction – relevant to ANY reaction
Reason
Increase Temperature Increase Particles move faster=more collisions that exceed activation energy
Decrease Temperature Decrease Particles move slower=less collisions that exceed activation energy
Increase Concentration of Reactant
Increase More particles per volume = more collisions
Decrease Concentration of Reactant
Decrease Less particles per volume = less collisions
Increase surface area (make particles smaller)
Increase More sites for collisions
Decrease surface area (make particles larger)
Decrease Less sites for collisions
Add a catalyst Increase Provides alternative route of lower activation energy = more collisions that exceed activation energy
Change Effect on Equilibrium Position - relevant to ANY reaction
Reason
Increase amount of reactant Moves right/forward/favours products
Equilibrium moves to reduce amount of reactant
Increase amount of product Moves left/backwards/favours reactants
Equilibrium moves to reduce amount of product.
Decrease amount of product Moves right/forward/favours products
Equilibrium moves to increase amount of product
Add a catalyst NO Change Forward and reverse reaction rate increase by the same amount
2A(g) + B(g) ↔ C(g) + D(g) ΔH -veReactants (3 moles) Products (2 moles) Forward Reaction
EXOTHERMIC
Change Effect on Equilibrium Position – relevant to THIS example
Reason
Increase pressure of mixture Moves right/forward/favours products
Equilibrium moves to decrease pressure – to the side with least moles/molecules
Decrease pressure of mixture Moves left/backwards/favours reactants
Equilibrium moves to increase pressure – to the side with most moles/molecules
Increase Temperature Moves left/backwards/favours reactants
Equilibrium moves to decrease temperature – moves in the endothermic direction
Decrease Temperature Moves right/forward/favours products
Equilibrium moves to increase temperature – moves in exothermic direction
Add a catalyst NO Change Forward and reverse reaction rate increase by the same amount
