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A scientist measures the standard enthalpy change for the following reaction to be -53.4 kJ :

Ca(OH)2(aq) + 2 HCl(aq) CaCl2(s) + 2 H2O(l)

Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is kJ/mol

  • chemistry -

    Do you have the dHf values for the other materials in the reaction? I don't have them in my text.
    dHrxn = (n*dHf products) - (n*dH reactants). Substitute and solve for dH H2O.

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