Chapter 2 heating and cooling of naphthalenePresentation Transcript
The heating curve of naphthalene Temperature ( 0 C) Time (min) Melting point A
The particle in solid gain kinetic energy and vibrate more vigrously.
Heat energy is absorbed by the particles in the solid is used to overcome the forces between particles and the solid change to liquid
The particles in solid begin to melt.
Its temperature remain constants because the heat energy absorbed by the particles is used to overcome the forces between particles and the solid turn to liquid.
The particles in the liquid absorbed heat energy and move faster.
The liquid turn to gas.
Heating of naphthalene x x x x x x x x
The cooling curve of naphthalene Discuss with group members the changes that take place in the cooling curve graph, involving the arrangement, the bond and the particles and energy content . (Refer textbook: pg15) Cooling of naphthalene