Question detail
What is the implication of a compound having a low lattice enthalpy?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Thermodynamics (A-level only)
Question
- A. It is likely to be a strong ionic compound.
- B. It may have significant covalent character.
- C. It will have a high melting point.
- D. It is likely to be insoluble in water.
Answer
It may have significant covalent character.
Explanation
The evidence shows that low lattice enthalpy values indicate weaker ionic bonds. This implies that the compound may possess significant covalent character, as covalent interactions can reduce the strength of ionic bonds. Therefore, a low lattice enthalpy suggests that the compound may have notable covalent character.
Common mistake
Misunderstanding Lattice Enthalpy
Students often confuse lattice enthalpy with covalent character, thinking that higher lattice enthalpy always indicates stronger covalent bonding.
To fix this, students should focus on understanding that lattice enthalpy reflects the strength of ionic bonds, while covalent character arises from the degree of electron sharing between atoms.
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