Use the Given Thermodynamic Data and the Reaction Below to Calculate

question 59

Multiple Choice

Use the given thermodynamic data and the reaction below to calculate ?S°(universe) for the formation of Fe2O3(s) at 298.15 K. 3 Fe(s) + 2 O₂(g) ? Fe₃O₄(s)
$$\begin{array} { l l l } \text { Species } & \Delta _f H ^ { \circ } ( \mathrm { kJ } / \mathrm { mol } ) & S ^ { \circ } ( \mathrm { J } / \mathrm { K } \cdot \mathrm { mol } ) \\\hline \mathrm { Fe } ( \mathrm { s } ) & 0.0 & 27.8 \\\mathrm { O } _ { 2 } ( \mathrm {~g} ) & 0.0 & 205.1 \\\mathrm { Fe } _ { 3 } \mathrm { O } _ { 4 } ( \mathrm {~s} ) & - 1118.4 & 146.4\end{array}$$

• A) -3404 J/K
• B) -1162 J/K
• C) +561.2 J/K
• D) +3404 J/K
• E) +7639 J/K

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