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Chapter 2 heating and cooling of naphthalene
 

Chapter 2 heating and cooling of naphthalene

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    Chapter 2 heating and cooling of naphthalene Chapter 2 heating and cooling of naphthalene Presentation 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.
      B
      • Heat energy is absorbed by the particles in the solid is used to overcome the forces between particles and the solid change to liquid
      C D
      • 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