Transcript A Bunch of Graphs

“Review” for Kinetics
Enthalpy level diagram
ENTHALPY
activation energy
energy necessary
to get the
reaction going
energy given
out, ∆H is
negative
reactants
products
REACTION CO-ORDINATE
activation energy
energy necessary
to get the
reaction going
ENTHALPY
products
reactants
REACTION CO-ORDINATE
Energy taken in
and now stored
in the bonds.
∆H is positive
Enthalpy level diagram
the reactant concentration changes with time
in a typical chemical reaction
2NO2(g)  2NO(g) + O2(g)
product
[NO2]
[ NO2 ]
 constant
t
t
[NO2]
t
product
reactant
the reactant and product concentration
changes with time in a typical chemical reaction