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Homework Help: Sodium hydroxide and hydrochloric acid

  1. Jan 28, 2010 #1
    1. The problem statement, all variables and given/known data
    We break down the rxn of NaOH with HCl into putting solid NaOH pellets in water and determine the delta H value. Next, we mix aqueous NaOH with a HCl (aq) and determine the delta H.
    Then we mix solid NaOH pellets in HCl(aq) and measure the delta H. Can we say that the delta H values for the first two rxns should add up to roughly the value of the third delta H allowing for some difference due to experimental error?

    2. Relevant equations

    3. The attempt at a solution
    Last edited: Jan 28, 2010
  2. jcsd
  3. Jan 28, 2010 #2


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    Science Advisor
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    The answer is '42'.
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