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d
The intermolecular attractive forces are broken by the addition of heat.
a
The temperature of the particles decrease because heat is being added.
b
The temperature of the particles increase because heat is being added.
c
The substance changes into a completely different substance. The particles of the original substance are destroyed and new particles form.
d
The intermolecular attractive forces are broken by the addition of heat.
The intermolecular attractive forces are broken by the addition of heat.