## Br2 (ℓ) + 2 NH4Cl (aq) → 2 NH4Br (aq) + Cl2 (g)

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## Reaction Type:

Single displacement/Oxidation-reduction

## Stoichiometry

Enter a mass or volume in one of the boxes below. Upon hitting submit, the stoichiometric equivalents will be calculated for the remaining reactants and products. All gases are assumed to be at STP.

 Heat Added: kJ Br2            Mass: g NH4Cl          Mass: g or Solution Volume: mL of Concentration: mol/L NH4Br          Mass: g Cl2            Mass: g or Gas Volume: L

## Enthalpy of Reaction

[2ΔHf(NH4Br (aq)) + 1ΔHf(Cl2 (g))] - [1ΔHf(Br2 (ℓ)) + 2ΔHf(NH4Cl (aq))]
[2(-254.06) + 1(0)] - [1(0) + 2(-299.66)] = 91.1999999999999 kJ
91.20 kJ     (endothermic)

## Entropy Change

[2ΔSf(NH4Br (aq)) + 1ΔSf(Cl2 (g))] - [1ΔSf(Br2 (ℓ)) + 2ΔSf(NH4Cl (aq))]
[2(195.81) + 1(222.97)] - [1(152.23) + 2(169.87)] = 122.62 J/K
122.62 J/K     (increase in entropy)

## Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[2ΔGf(NH4Br (aq)) + 1ΔGf(Cl2 (g))] - [1ΔGf(Br2 (ℓ)) + 2ΔGf(NH4Cl (aq))]
[2(-183.34) + 1(0)] - [1(0) + 2(-210.62)] = 54.56 kJ
54.56 kJ     (nonspontaneous)

From ΔG = ΔH - TΔS:
54.64 kJ     (nonspontaneous)

## Equilibrium Constant, K (at 298.15 K)

2.7603851402e-010
This process is not favorable at 25°C.