Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In an Ellingham diagram, the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature.
Reason R: CO tends to get decomposed at higher temperature.
In the light of the above statements, choose the correct answer from the options given below
Solution
$$
2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{CO}(\mathrm{g})
$$
<br/><br/>$\Delta_{\mathrm{r}} \mathrm{S}^0$ is $+v e, \Delta_{\mathrm{r}} \mathrm{G}^0=\Delta_{\mathrm{r}} \mathrm{H}^0-\mathrm{T} \Delta_{\mathrm{r}} \mathrm{S}^0$;
<br/><br/>Thus slope is negative.
<br/><br/>As temperature increases $\Delta_{\mathrm{r}} G^{\mathrm{o}}$ becomes more negative thus it has lower tendency to get decomposed.
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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