# Problem: Consider the following unbalanced oxidation-reduction reactions in aqueous solution:Ag+(aq) + Li(s) → Ag(s) + Li+(aq)Fe(s) + Na+(aq) → Fe2+(aq) + Na(s)K(s) + H2O(l)  →  KOH(aq) + H2(g)By using data in Appendix C, calculate ΔH˚ for each of the reactions.

###### FREE Expert Solution

$\overline{){\mathbf{∆}}{{\mathbf{H}}}_{{\mathbf{rxn}}}{\mathbf{=}}{\mathbf{∆}}{{\mathbf{H}}}_{\mathbf{f}\mathbf{,}\mathbf{products}}{\mathbf{-}}{\mathbf{∆}}{{\mathbf{H}}}_{\mathbf{f}\mathbf{,}\mathbf{reactants}}}$

###### Problem Details
Consider the following unbalanced oxidation-reduction reactions in aqueous solution:
Ag+(aq) + Li(s) → Ag(s) + Li+(aq)
Fe(s) + Na+(aq) → Fe2+(aq) + Na(s)
K(s) + H2O(l)  →  KOH(aq) + H2(g)
By using data in Appendix C, calculate ΔH˚ for each of the reactions.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.