What is the total energy change for the reaction of molecular hydrogen with molecular oxygen to form water?

2 H2 (g) + O2 (g) ----> H2O (g) + energy

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1 Answer

  • david
    Lv 7
    1 month ago

    572 Kj ... as per google ... your book probably has a table for you to look things like this up

    • pisgahchemist
      Lv 7
      1 month agoReport

      No.  -572 kJ is the enthalpy change for the formation of TWO moles of LIQUID water, not water vapor.  The question suggests the use of bond energies and they can only be applied to species in the gaseous state.

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