Problem: Use the given data at 298 K to calculate ∆G° for the reaction2Cl2(g)       +       SO2(g)       →       SOCl2(g)       +        Cl2O(g)Substance:                    Cl2(g)                 SO2(g)                SOCl2(g)              Cl2O(g)∆H° f (kJ/mol):                 0                     –296.8                   –212.5                80.3     S°(J/K⋅mol):                    223.0                  248.1                    309.77               266.1A) 129.3 kJB) 133.6 kJC) 196.0 kJD) 199.8 kJE) 229.6 kJ

FREE Expert Solution

We’re being asked to determine the ∆G° at 298 K for the given reaction:


2Cl2(g)       +       SO2(g)       →       SOCl2(g)       +        Cl2O(g)



We’re given the ΔH˚f and S˚ of each reactant and product:


Substance:                    Cl2(g)                 SO2(g)                SOCl2(g)              Cl2O(g)

∆H° f (kJ/mol):                 0                     –296.8                   –212.5                80.3

     S°(J/K⋅mol):                    223.0                  248.1                    309.77               266.1


We can use the following equation to solve for ΔG˚rxn:


ΔG°rxn=ΔH°rxn-TΔS°rxn


For this problem, we need to do the following steps:

Step 1: Calculate ΔH˚rxn.

Step 2: Calculate ΔS˚rxn.

Step 3: Use ΔH˚rxn and ΔS˚rxn to calculate for ΔG˚rxn.


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Problem Details

Use the given data at 298 K to calculate ∆G° for the reaction

2Cl2(g)       +       SO2(g)       →       SOCl2(g)       +        Cl2O(g)

Substance:                    Cl2(g)                 SO2(g)                SOCl2(g)              Cl2O(g)

∆H° f (kJ/mol):                 0                     –296.8                   –212.5                80.3

     S°(J/K⋅mol):                    223.0                  248.1                    309.77               266.1


A) 129.3 kJ

B) 133.6 kJ

C) 196.0 kJ

D) 199.8 kJ

E) 229.6 kJ

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