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Homework Help: Chemical rxns in a typical automoblie lead-acid battery.

  1. Oct 19, 2007 #1
    A typical automoblie engine uses a lead-acid battery. During discharge, the following chemical reaction takes place.
    Pb (s) +PbO2 (s) +2H2SO4 (aq) +2H2O2 (l)
    (1) Pb (s) +PbO[sub]2[sub] [sub](s)[sub] +2SO[sub]3 (g) ---> 2PbSO[sub]4 (s) H= -775KJ
    (2) SO[sub]3 (g) + H[sub]2[sub]O[sub]2[sub] [sub](l)[sub] ---> H[sub]2[sub]SO[sub]4[sub] [sub](aq)[sub] H= -133KJ[/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub][/sub]
    Last edited: Oct 19, 2007
  2. jcsd
  3. Oct 20, 2007 #2


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    1. What is the question?
    2. Please edit the post so that every closing "sub" tag looks like [/sub].

    Example: O2 --->O [s u b]2[/ s u b] without spaces
  4. Oct 22, 2007 #3


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    Here it is Gokul.... Is there a question lurking in there?
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