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CGP EDU Academic Team
Published on: August 14, 2026
At 298 K, change in internal energy for the complete combustion of fullerene, C 60 (s), an allotrope of carbon, and the enthalpy of formation of CO 2 (g) are –25970 kJ mol –1 and –393 kJ mol –1 respectively. The enthalpy of formation of C 60 (s) at 298 K is
Text Solution
Verified by ExpertsThe correct answer is:
D
C 60 (s) + 60 O 2 (g) 
60 CO 2 (g) Δ U = –25970 kJ/mole.
Δ H = Δ U + Δ n g RT
= –25970 kJ/mole
Δ H rxn = 60 Δ H ƒ (CO 2 , g) – Δ H ƒ (C 60,S ) – 60 Δ H ƒ (O 2 , g)
–25970 = 60(–393) – Δ H ƒ (C 60 )
Δ H ƒ (C 60 ) = 60(–393) + 25970
= 2390 kJ
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