10.1 & 10.2 Flashcards
is combustion exo or endo thermic
exothermic
is the change in enthalpy positive or negative in exothermic reactions
negative
what is dynamic equilibrium
both forwards & backwards reaction take place at the same time at the same rate
what conditions must be met for dynamic equilibrium to occur
reaction must be reversible
reaction mixture must be in a closed container
how does increasing the concentration of the reactants effect the equilibrium
the rate of the forwards reaction would increase and the position of equilibrium will shift towards the right so more products will be formed
how can you easily change the pressure of a system to see its effect on rate of reaction
do the reaction in a gas syringe and change the pressure by pushing or pulling the plunger
state what would happen to the equilibrium of a reaction where the forward reaction is exothermic if temperature is increased
the backwards reaction will increase so equilibrium will shift to the left
state what would happen to the equilibrium of a reaction where the forward reaction is endothermic if temperature is increased
the forwards reaction will increase so equilibrium will shift to the right
how does a catalyst effect the equilibrium of a reaction
reduces the time taken for equilibrium to be established
increases rate of forwards and backwards reaction at the same rate
what is a homogenous system
one in which all components are in the same phase
what is a heterogenous system
one in which at least two different phases are present
what is the equation for Kc
Kc = [products^coefficients]/
[reactants^coefficients]
what does Kc stand for
equilibrium constant
