Answers section
Questions 3.3(a)
- Is there any noticeable effect of heat on sodium chloride crystals or copper (II) oxide?
- What can you say about melting point of sodium chloride and copper (II) oxide?
- 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)
- No; there is no noticeable change when sodium chloride crystals are heated.
- Sodium chloride and copper (II) oxide have high melting points.
- They require large amounts of heat energy to melt.