Given the abbreviated table for selected standard state entropy values of each substance in the reaction below, what is the value of the standard change in entropy, D S ° , for the following chemical reaction?
3 H2 (g) + Fe2O3 (s) →2 Fe (s) + 3 H2O (g) Substance S ° (Jmol - 1K - 1) H2 (g) 130.6 Fe (s) 27.3 Fe2O3 (s) 87.4 H2O (g) 188.7
A) D S ° = - 32.5 Jmol - 1K - 1
B) D S ° = - 2.0 Jmol - 1K - 1
C) D S ° = 141.5 Jmol - 1K - 1
D) D S ° = 316.3 Jmol - 1K - 1
E) D S ° = 925.1 Jmol - 1K - 1
Correct Answer:
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