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The enthalpy changes, H, for three reactions are given. H2(g)+21O2(g)H2O(l)Ca(s)+2H+(aq)Ca2+(aq)+H2(g)CaO(s)+2H+(aq)Ca2+(aq)+H2O(l)H=286kJ/molH=544kJ/molH=193kJ/mol Using Hess's law, calculate the heat of formation for CaO(s) using the reaction shown. Ca(s)+21O2(g)CaO(s)

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The enthalpy changes, H, for three reactions are given. H2(g)+21O2(g)H2O(l)Ca(s)+2H+(aq)Ca2+(aq)+H2(g)CaO(s)+2H+(aq)Ca2+(aq)+H2O(l)H=286kJ/molH=544kJ/molH=193kJ/mol Using Hess's law, calculate the heat of formation for CaO(s) using the reaction shown. Ca(s)+21O2(g)CaO(s) H= kJ/mol

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