Kinetics and equilibrium Flashcards
get smart (36 cards)
explain how increasing the concentration would increase the reaction rate
more frequent collisions per unit time
explain how increasing the surface area would increase the reaction rate
it exposes more particles to potential collisions leading to more frequent collisions.
explain how increasing the temperature would increase the reaction rate
- more frequent collisions
- more particles will have enough energy to overcome the activation energy
explain how adding a catalyst would increase the reaction rate
lowers activation energy
provides alternate pathway
where are the products and reactants on a graph
reactants on the left products on the right
Delta H calc
Products - reactants.
if endothermic +
if exothermic -
Activation energy calc
the peak of the graph to the reactants
when drawing distribution curves, how should graph look
lower temp(more steep) and farther to the left
Higher temp more to the right and less steep
Distribution curves x and y axis?
x= kinetic energy
y= # of particles
Change in mass over time(calc of rate of reaction)
*same goes for change in volume)
A gas is produced
(look for g on right side of equation)
Change in color over time(calc of rate of reaction)
look for a Br2 or iodine 2
change in conductivity over time(calc of rate of reaction)
The number of ions on the left and right side of the equation are different
when calculating rate of reaction with graph
Has to be positive
if there are coefficients use stoich
what makes Kc change
temperature
List 4 things about equilibrium
- Rates of the forward and reverse reactions are equal
- concentrations of the reactants and products remain constant
- must happen in closed system
- reactions are dynamic
when asked to write expression for Kc
Products(right hand side)/ reactants(left hand side)
Coefficients are exponents
effects of a catalyst on a forward and reverse reactions
rate would increase more collisions per unit time
no change to the Kc
no shift
what is Ea
energy needed to get a reaction going
two characteristics of a reversible reaction in a state of equilibrium
concentration is constant for both forward and reverse reaction
the rate of the reaction going forward and reverse are the same
Delta H is negative
right hand side of the equation
Delta H is positive
Left hand side of equation
does adding a catalyst affect the shift of a reaction
no
what does adding a catalyst do to the rate of reaction
Activation energy decreases
Collision frequency increases
what determines whether a reaction occurs
the orientation of molecules
the energy of molecules
