# Calculate the entropy change for the reaction  $CO(g) + \large\frac{1}{2}$ $O_2(g) \rightarrow CO_2(g);\: \: \: \: \: \Delta S^o_{CO2} = 213.6\: J/Kmol, \Delta S^o_{CO }= 197.6\: J/Kmol, \Delta S^o_{O2} = 205.03 \: J/Kmol$
$\begin {array} {1 1} (a)\;-189.03\: J/Kmol & \quad (b)\;86.5\: J/Kmol \\ (c)\; -86.5\: J/Kmol & \quad (d)\;189.03\: J/Kmol \end {array}$