3 Cl2 (g) + 5 AgNO3 (aq) + 3 H2O (ℓ) → HClO3 (aq) + 5 HNO3 (aq) + 5 AgCl (s)

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Stoichiometry

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Cl2            Mass: g  or Gas Volume: L
AgNO3          Mass: g  or Solution Volume: mL of Concentration: mol/L
H2O            Mass: g
HClO3          Mass: g
HNO3           Mass: g
AgCl           Mass: g
Heat Released: kJ

Enthalpy of Reaction

[1ΔHf(HClO3 (aq)) + 5ΔHf(HNO3 (aq)) + 5ΔHf(AgCl (s))] - [3ΔHf(Cl2 (g)) + 5ΔHf(AgNO3 (aq)) + 3ΔHf(H2O (ℓ))]
[1(-99.16) + 5(-207.36) + 5(-127)] - [3(0) + 5(-101.78) + 3(-285.83)] = -404.57 kJ
-404.57 kJ     (exothermic)

Entropy Change

[1ΔSf(HClO3 (aq)) + 5ΔSf(HNO3 (aq)) + 5ΔSf(AgCl (s))] - [3ΔSf(Cl2 (g)) + 5ΔSf(AgNO3 (aq)) + 3ΔSf(H2O (ℓ))]
[1(162.34) + 5(146.44) + 5(96.3)] - [3(222.97) + 5(219.12) + 3(69.91)] = -598.2 J/K
-598.20 J/K     (decrease in entropy)

Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[1ΔGf(HClO3 (aq)) + 5ΔGf(HNO3 (aq)) + 5ΔGf(AgCl (s))] - [3ΔGf(Cl2 (g)) + 5ΔGf(AgNO3 (aq)) + 3ΔGf(H2O (ℓ))]
[1(-3.35) + 5(-111.34) + 5(-109.8)] - [3(0) + 5(-34.22) + 3(-237.18)] = -226.41 kJ
-226.41 kJ     (spontaneous)

From ΔG = ΔH - TΔS:
-226.22 kJ     (spontaneous)

Equilibrium Constant, K (at 298.15 K)

4.6507499942e+039
This process is favorable at 25°C.