Calculate the entropy change \( (\mathrm{J} / \mathrm{molK}) \) of ...

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Calculate the entropy change \( (\mathrm{J} / \mathrm{molK}) \) of the
P given reaction. The molar entropies [J/K-mol]

W are given in brackets after each substance.
\[
\begin{array}{l}
2 \mathrm{PbS}(s)[91.2]+3 \mathrm{O}_{2}(g)[205.1] \longrightarrow \\
2 \mathrm{PbO}(s)[66.5]+2 \mathrm{SO}_{2}(g)[248.2]
\end{array}
\]
(1) -113.5
(2) -168.3
(3) +72.5
(4) -149.2
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