N which thermochemical equations would the ΔH be considered a heat of solution?

2C8H18(l)+25O2(g)→16CO2(g)+18H2O(l) , ΔH =–5,471 kJ/mol

2NaHCO3(s)→Na2CO3 (s) + H2O (g) + CO2 (g), ΔH = –129 kJ

C6H6(s)→C6H6(l), ΔH=+9.87 kJ

NH4NO3(s)→NH4+(aq)+NO3–(aq), ΔH=+25.7 kJ/mol