Calculate $\Delta$ S ^$\circ$ at 25 ^$\circ$ C for the Reduction of PbO(s), 2PbO(s) + C(s)

question 65

Multiple Choice

Calculate $\Delta$ S ^$\circ$ at 25 ^$\circ$ C for the reduction of PbO(s) , 2PbO(s) + C(s) $\rarr$ 2Pb(s) + CO₂(g) given these absolute entropies: $\begin{array}{lc}&\mathrm{S}^{\circ}(\mathrm{J} / \mathrm{K} \cdot \mathrm{~mol}) \\\hline\mathrm{PbO}(\mathrm{s}) & 69.45 \\\mathrm{C}(\mathrm{s}) & 5.7 \\\mathrm{Pb}(\mathrm{s}) & 64.89 \\\mathrm{CO}_{2}(\mathrm{g}) & 213.6\end{array}$

• A) +198.8 J/K·mol
• B) +488.0 J/K·mol
• C) +353.6 J/K·mol
• D) -203.3 J/K·mol
• E) +203.3 J/K·mol

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Definitions:

Cognitive-Behavioural Therapy

A psychotherapeutic approach that addresses dysfunctional emotions, behaviours, and cognitions through a goal-oriented, systemic process.

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