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Homework Help: Just a simple question on a reaction

  1. Sep 24, 2006 #1
    Mixing CuSO_4 and H_2O, heat was produced during the reaction. Why did that happen?
  2. jcsd
  3. Sep 26, 2006 #2
    the simplest answer is that when the cupper and sulfate ions dissociated energy was released.
  4. Sep 26, 2006 #3


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    Staff: Mentor

    The simplest answer is slightly wrong here, as if you will mix CuSO4.5H2O with water you will not observe substantial heat evolving.

    Look for heat of hydration.
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