Solution: Calculate the standard entropy change for the following reaction, 2SO2 (g) + O2 (g) → 2SO3 (g) given S° [SO2 (g)] = 248.2 J/K • mol. S° [O2 (g)] = 205. 1 J/K • mol, and S° [SO3 (g)] = 256.8 J/K • mol.

Calculate the standard entropy change for the following reaction, 

2SO₂ (g) + O₂ (g) → 2SO₃ (g) 

given S° [SO₂ (g)] = 248.2 J/K • mol. S° [O₂ (g)] = 205. 1 J/K • mol, and S° [SO₃ (g)] = 256.8 J/K • mol. 

(a) -196.5 J/K • mol-rxn 

(b) -94.0 J/K • mol-rxn 

(c) -187.9 J/K • mol-rxn 

(d) +187.9 J/K • mol-rxn 

(e) +196.5 J/K • mol-rxn