Ag2O(s)+2HNO3(aq) → H2O(l)+2AgNO3(aq) ΔH = -44.8 kJ
2Ag(s)+½O2(g) → Ag2O(s) ΔH = -31.0 kJ
H2(g)+½O2(g) → H2O(l) ΔH = -285.8 kJ

Use Hess’s Law to determine ΔH for the reaction:

AgNO3(aq)+½H2(g) → HNO3(aq)+Ag(s)
ΔH =