Question: 9. On a heating curve, why does the graph become horizontal when a solid becomes a liquid? (a) The kinetic energy of the particles in

9. On a heating curve, why does the graph become horizontal when a solid becomes a liquid?

(a) The kinetic energy of the particles in the solid decreases.

(b) The particles in the solid stop vibrating.

(c) The energy supplied is absorbed by the container holding the solid.

(d) The energy supplied is used to overcome the attractive forces between the particles in the solid.

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