Chapter 6 Equilibrium Flashcards
What is equilibria?
The concentrations of reactants and products remain constant because the rate of the forward
reaction equals the rate of the reverse reaction.
What is Q?
calculated value that relates the reactant and product concentrations when not at equilibrium
Difference btwn Keq and Q?
Keq is at equilibrium and Q isn’t
At equilibrium what are entropy and free energy at?
Entropies at max and free energy at minimum
What does Q<Keq mean?
- Greater concentration of reactants.
- Forward rate of reaction is increased (favors products)
- ΔG < 0
What does Q = Keq mean?
- Reactants and products are present in equilibrium proportions
- Forward and reverse rates of reaction are equal
- ΔG = 0
What does Q>Keq mean?
- Greater concentration of products
*reverse rate of reaction is increased (favors reactants)
* ΔG > 0
What does it mean if Keq > 1?
The products are present in greater concentration at equilibrium
What does it mean if Keq = 1?
products and reactants are both present at equilibrium at reasonably similar levels
What does it mean if Keq < 1?
the reactants are present in greater concentration at equilibrium
What does it mean Keq««<1?
the amount of reactants that have been converted to products can be considered
negligible in comparison to the initial concentration of reactants
*Keqs like 1X10^-12 & 1x10^-15
What is kinetic product?
Forms At lower temperatures with smaller heat transfer. Less stable than thermo.
Faster than thermo.
Higher in free energy than thermo.
What is the Thermodynamic Product?
Forms at higher temperatures with larger heat transfer. More stable than Kinetic.
Slower than kinetic.
More spontaneous (negative Delta G.
