TS EAMCET · Chemistry · p Block Elements (Group 13 & 14)
The correct order of " \(\Delta_f \mathrm{H}^{\circ}\) " values of Diamond (I), Graphite (II) and Fullerene (III) is
- A I > II > III
- B II > I > III
- C III > I > II
- D III > II > I
Answer & Solution
Correct Answer
(C) III > I > II
Step-by-step Solution
Detailed explanation
Heat of formation \(\left(\Delta_{\mathrm{f}} \mathrm{H}^0\right)\) values of Graphite (II) is taken as zero since it is the most stable allotrope of carbon. \(\Delta_{\mathrm{f}} \mathrm{H}^{\mathrm{O}}\) \((\) Diamond \()=1.90 \mathrm{~kJ} / \mathrm{mol}\) and…
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