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Questions 3.3(a)

  1. Is there any noticeable effect of heat on sodium chloride crystals or copper (II) oxide?
  2. What can you say about melting point of sodium chloride and copper (II) oxide?
  3. What can you say about the amount of heat energy required to melt sodium chloride or copper (II) oxide?


Answers to Questions 3.3(a)

  1. No; there is no noticeable change when sodium chloride crystals are heated.
  2. Sodium chloride and copper (II) oxide have high melting points.
  3. They require large amounts of heat energy to melt.