If 3500 G of Ni Are Reacted with Excess Oxygen to to Form

question 75

Multiple Choice

If 3.500 g of Ni are reacted with excess oxygen to form nickel oxide (NiO) under standard state conditions, what is the entropy change for the reaction?
2Ni(s) + O₂ $\leftrightarrow$ 2NiO(s) $\begin{array}{lr}\text { Substance } & S^{\circ}(\mathbf{J} / \mathbf{m o l} \cdot \mathbf{K}) \\\mathrm{Ni} & 182.1 \\\mathrm{O}_{2} & 205.0 \\\mathrm{NiO} &37.99\end{array}$

• A) -49.3 J/K
• B) -24.7 J/K
• C) -14.7 J/K
• D) +49.3 J/K
• E) -10.4 J/K

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