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Confused about equilibrium constant K

  1. Jan 12, 2010 #1
    why the equilibrium constant only depending on temperature but not concentration and partial pressure ?

    Since K= [product]/[reactants], why the value of K remain the same as [product]or [reactant] increase ?
     
  2. jcsd
  3. Jan 12, 2010 #2

    Borek

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    Staff: Mentor

    When you add products or reactants Q - so called reaction quotient, defined identically as K - changes its value. However, after that system will react and concentrations of products and reactants will change till Q=K. K describes system at equilibrium, Q describes system at any moment.
     
    Last edited by a moderator: Aug 13, 2013
  4. Jan 14, 2010 #3
    isn't mean that the ratio of [products] / [reactants] remain unchanged after the system is adjusted to equilibrium ??
     
  5. Jan 14, 2010 #4

    Borek

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    Staff: Mentor

    System is not adjusted, system adjusts itself. It is not just ratio of products/reactants we are talking about, but reaction quotient, which is more complicated than simple ratio. And finally this is not a correct phrase and I have troubles trying to decipher what you are asking about. Please elaborate.
     
    Last edited by a moderator: Aug 13, 2013
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