Chemistry Practice Problems Entropy Practice Problems Solution: Calculate ΔS°rxn for the following reaction:4Cr(s)...

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Solution: Calculate ΔS°rxn for the following reaction:4Cr(s) + 3O2(g) → 2Cr2O3(s).Substance            ΔS°, J/K·molCr(s)                        23.77O2(g)                       205.138Cr2O3(s)                  81.2a. 548.1 J/Kb. 147.7 J/Kc. -147.7 J/Kd. -548.1 J/K

Problem

Calculate ΔS°rxn for the following reaction:

4Cr(s) + 3O2(g) → 2Cr2O3(s).

Substance            ΔS°, J/K·mol

Cr(s)                        23.77

O2(g)                       205.138

Cr2O3(s)                  81.2

a. 548.1 J/K

b. 147.7 J/K

c. -147.7 J/K

d. -548.1 J/K

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