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Calculating the Standard Enthalpy of a Reaction

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Using the standard enthalpies of formation, what is the standard enthalpy of the following reaction?
CO(g)+ H2O(g)?CO2 (g)+ H2 (g)
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HINT: You can to look up the enthalpies of formation for the reactants and products here: https://sites.google.com/site/chempendix/thermo

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The expert calculates the standard enthalpy of a reaction.

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SOLUTION:

∆H0rxn = ∑n∆Hformation of products - ∑n∆Hformation of reactants
Where: n and m are ...

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