homework problem

Question

What is ΔH∘rxn for the following chemical reaction?
CO2(g)+2KOH(s)→H2O(g)+K2CO3(s)

Express the standard enthalpy of reaction to three significant figures and include the appropriate units.

VALUE........; UNITS...........

Answer 1

CO2(g)+2KOH(s) ==> H2O(g)+K2CO3(s)

 

How can this be answered without additional information?  We need either bond energies, or enthalpy of formation for the reactants and products, or some other informative data.  Normally, you would be provided the ∆H_formation and then you use:  ∑∆H_products - ∑∆H_reactants