The standard entropies of CO_{2(g)},C_{(s)} a | vedclass

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Question

(C) The formation reaction of $CO_{2(g)}$ is: $C_{(s)} + O_{2(g)} 	o CO_{2(g)}$ The standard entropy of formation $\Delta_f S^o$ is calculated as: $\

Vedclass · Accepted Answer

$2.81$

Vedclass · Answer

(C) The formation reaction of $CO_{2(g)}$ is: $C_{(s)} + O_{2(g)} 	o CO_{2(g)}$ The standard entropy of formation $\Delta_f S^o$ is calculated as: $\Delta_f S^o = S^o(CO_{2(g)}) - [S^o(C_{(s)}) + S^o(O_{2(g)})]$ Substituting the given values: $\Delta_f S^o = 213.5 - (5.690 + 205) \ J \ K^{-1} \ mol^{-1}$ $\Delta_f S^o = 213.5 - 210.690 \ J \ K^{-1} \ mol^{-1}$ $\Delta_f S^o = 2.81 \ J \ K^{-1} \ mol^{-1}$ Therefore,the correct option is $C$.

The standard entropies of $CO_{2(g)}$,$C_{(s)}$ and $O_{2(g)}$ are $213.5$,$5.690$ and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is ...... $J \ K^{-1} \ mol^{-1}$.

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