Answer
$C(s, diamond)\lt C(s, graphite)\lt C(s, amorphous)$
Among these allotropes, movement of atoms is most restricted in diamond. In graphite, atoms as sheets can slide past each other. In amorphous carbon, atoms are free.
Entropy increases when mobility of atoms increases.
Therefore entropy increases in the order as written above.
Work Step by Step
Among these allotropes, movement of atoms is most restricted in diamond. In graphite, atoms as sheets can slide past each other. In amorphous carbon, atoms are free. Entropy increases when mobility of atoms increases.
Therefore entropy increases in the order
$C(s, diamond)\lt C(s, graphite)\lt C(s, amorphous)$
