Full Member
Jul 5, 2009
  1. Pre-Dental
    in the reaction A+B --> c+D and the EMF = -2.85V

    kbb p.960 says "reaction proceed spontaneously to the left"

    how do we know the reaction direction out of EMF?

    could anyone give me some explanation?


    Full Member
    10+ Year Member
    Jul 25, 2007
    1. Pre-Dental
      It's first important to remember a few things: A reaction is spontaneous (in the forward direction) if K>1, delta G = - , and EMF = +.

      Though I dont' remember encountering a problem like this in the past, I can deduct from the info I just wrote that since EMF = -, it cannot be spontaneous in the forward direction, so it must be spontaneous in the reverse. It's generally one or the other. Just manipulate the above info to come to ur answer.

      Just my two cents.
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