## F2 (g) + 2 NaI (aq) → 2 NaF (aq) + I2 (s)

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## Reaction Type:

Single displacement/Oxidation-reduction

## Stoichiometry

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 F2             Mass: g or Gas Volume: L NaI            Mass: g or Solution Volume: mL of Concentration: mol/L NaF            Mass: g I2             Mass: g Heat Released: kJ

## Enthalpy of Reaction

[2ΔHf(NaF (aq)) + 1ΔHf(I2 (s))] - [1ΔHf(F2 (g)) + 2ΔHf(NaI (aq))]
[2(-495.74) + 1(0)] - [1(0) + 2(-295.29)] = -400.9 kJ
-400.90 kJ     (exothermic)

## Entropy Change

[2ΔSf(NaF (aq)) + 1ΔSf(I2 (s))] - [1ΔSf(F2 (g)) + 2ΔSf(NaI (aq))]
[2(204.48) + 1(116.14)] - [1(202.71) + 2(170.29)] = -18.1900000000001 J/K
-18.19 J/K     (decrease in entropy)

## Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[2ΔGf(NaF (aq)) + 1ΔGf(I2 (s))] - [1ΔGf(F2 (g)) + 2ΔGf(NaI (aq))]
[2(-524.24) + 1(0)] - [1(0) + 2(-313.49)] = -421.5 kJ
-421.50 kJ     (spontaneous)

From ΔG = ΔH - TΔS:
-395.48 kJ     (spontaneous)

## Equilibrium Constant, K (at 298.15 K)

7.0422926332e+073
This process is favorable at 25°C.