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Chemical Equilibrium

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Chemical Equilibrium 17.1 Dynamic Equilibrium The Equilibrium Constant Keq Reversible Reactions 2 SO2 + O2 2 SO3 Reversible Reactions 2 SO2 + O2 2 SO3 2 SO3 ... – PowerPoint PPT presentation

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Title: Chemical Equilibrium


1
Chemical Equilibrium
  • 17.1
  • Dynamic Equilibrium
  • The Equilibrium Constant Keq

2
Reversible Reactions
  • 2 SO2 O2 ? 2 SO3

3
Reversible Reactions
  • 2 SO2 O2 ? 2 SO3
  • 2 SO3 ? 2 SO2 O2

4
Reversible Reactions
  • 2 SO2 O2 ? 2 SO3
  • 2 SO3 ? 2 SO2 O2
  • 2 SO2 O2 ?? 2 SO3

5
Dynamic Equilibrium
6
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7
Dynamic Equilibriumin Chemical Reactions
  • 2 SO2 O2 ?? 2 SO3

8
Equilibrium Constant - Keq
  • aA bB ?? cC dD
  • Keq Cc Dd
  • AaBb

9
Equilibrium Constant - Keq
  • 2 SO2 O2 ?? 2 SO3
  • Keq SO32
  • SO22 O2

10
Equilibrium Constant - Keq
  • Keq Cc Dd
  • AaBb
  • Keq gt 1 Products are favored
  • Keq lt 1 Reactants are favored

11
Sample Problem A
  • Find Keq for the following situation
  • Hydrogen gas and fluorine gas combine reversibly
    to form hydrogen fluoride gas. If their
    equilibrium concentrations are as follows,
    hydrogen .05 moles, fluorine .07 moles and
    hydrogen fluoride .24 moles, what is the
    equilibrium constant?

12
Sample Problem B
  • At high temperatures, Carbon Monoxide and Steam
    react reversibly to form Hydrogen and Carbon
    Dioxide. The equilibrium partial pressures of
    Carbon Monoxide and Steam are .41 atm and .38 atm
    respectively. If the equilibrium constant is
    1.19, and Carbon Dioxide and Hydrogen were
    produced in equal amounts, what are the partial
    pressures of the two product gasses?
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