Everything you will need as you study through Chemical Equilibrium. This document includes everything specified in the SAGS document and more. Diagrams and step-by-step explanations have been provided to help you understand the work easier. Topics covered in this document include Kc calculations, f...
,DEFINITIONS
A closed system An open system
01 A system in which mass is 02 A system in which both energy
and matter can be exchanged
conserved inside the system
but energy can enter/leave the between the system and its
system freely surroundings
Dynamic
A reversible chemical
reaction equilibrium
03 A reaction in which products
04 A reversible reaction in which the
can be converted back into forward and the reverse reactions
reactants are taking place at the same rate.
Concentrations of reactants and
products are constant
, Factors that can change
the equilibrium position of a
system/reaction
Temperature Pressure Concentration
REX: Reduced temp -> Increase pressure -> volume Increase reactant -> forward
exothermic reaction decreases & the system reaction favoured
HEN: Hotter temp -> favours the reaction with Remove product -> forward
endothermic reaction the lowest no. moles reaction favoured
If the no. of
moles are
equal (L=R)
then there's
no effect to
a change in
pressure
, Reaction graphs
Concentration Rate vs time
vs time
o Equilibrium is shown with
o Equilibrium is shown with both lines on top of each
separate straight lines other (straight)
o Products & reactants o Products & reactants not
shown on the graph shown, only reactions
o ( --> & <-- )
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