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Given the Unbalanced Reaction and the Enthalpies of Formation of Molecules

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Given the unbalanced reaction and the enthalpies of formation of molecules. H2SO4 (ΔHf = −814.00 kJ/mol) + NaCl (ΔHf = −385.90 kJ/mol) → Na2SO4 (ΔHf = −331.64 kJ/mol) + HCl (ΔHf = −92.31 kJ/mol)
What is the enthalpy change of the reaction?


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