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Homework Help: What is the standard enthalpy of formation of NaF

  1. Apr 22, 2009 #1
    1. The problem statement, all variables and given/known data
    Please help! i just need to see one step by step solution of how to solve this problem and then I can figure the rest out.
    When .560g of Na (s) reacts with excess F2(g) to form NaF(s), 13.8 kj of heat is evolved at standard state conditions. What is the standard enthalpy of formation of NaF (s)?

    2. Relevant equations
    (delta H=-569Kj/Mol)

    3. The attempt at a solution
  2. jcsd
  3. Apr 23, 2009 #2


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    Staff: Mentor

    Re: Enthalpy

    Standard enthalpy is per mole NaF produced, you have it per 0.560g of Na. How many moles produced?
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