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Homework Help: Heat Released In Enthalpy

  1. Sep 28, 2007 #1
    Hi, new to the forum.

    I need help on how to find out how much heat is released in an enthalpy reaction.

    The problem is: 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) Delta H = -1652 kJ
    (a) How much heat is released when 4.68 mol iron is reacted with excess O2?
  2. jcsd
  3. Sep 28, 2007 #2
    make a conversion factor (aka as unit factor) out of your equation

    4 moles of Fe = -1652 kJ

    4.68 mol of Fe = x kJ
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