Using the standard enthalpies of formation, what is the standard enthalpy of reaction? CO ( g ) + H 2 O ( g ) ⟶ CO 2 ( g ) + H 2 ( g )

Answer 1

To solve this problem, you will need to look up the standard enthalpy values for each substance in the reaction as you will need these values to solve for the standard enthalpy. (***NOTE always check what state each substance is in because each state of the substance has a different standard enthalpy)

Once these values are obtained, you can then plug in the values to the standard enthalpy formation equation and solve for the standard enthalpy. See video above for complete answer.

Answer 2

Look up the values for ∆H formation for CO2(g) and H2(g). Add them together to get ∆Hproducts

Look up the values for ∆H formation for CO(g) and H2O(g). Add them together to get ∆Hreactants

∆Hrxn = ∆Hproducts - ∆Hreactants