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Thermochemistry 2

  1. Apr 26, 2009 #1

    zinc reacts with HCl according to the eq

    Zn + 2HCl ------> ZnCl2 + H2 , delta H= -150 kj

    * IF SULPHURIC ACID IS USED INSTEAD HCl ..jow many moles of sulphuric acid react with excess amount of zinc so the change in heat content is -150 kj
  2. jcsd
  3. Apr 26, 2009 #2


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    Staff: Mentor

    You have to try by yourself first.

    Besides, it looks like a homework question to me, and this is not a forum for HW.
  4. Apr 27, 2009 #3

    firstly its not a hw question

    secondly i tried but im not sure

    i said that the answer will be (one mole )as Zn +H2SO4---->ZnSO4 + H2
    but i dont know is it write or wrong ??????

    thank u
  5. Apr 27, 2009 #4


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    Staff: Mentor

    Write net ionic reaction equation, it should be obvious then. But you seem to be on the right track.
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