First slide

Thermochemical equation, Standard states

Question

Thermodynamically most stable allotrope of carbon is

Easy

A

fullerenes
B

graphite
C

diamond
D

all are equally stable

Solution

$Δ_{f}$ H (graphite) = zero
$Δ_{f}$ H (diamond) =1.9 kJ mol^-1
$Δ_{f}$ H (C₆₀) = 38.1 kJ mol^-1

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