Question detail
Explain why small molecular substances typically have low melting points and boiling points.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
How bonding and structure are related to the properties of substances
Question
Explain why small molecular substances typically have low melting points and boiling points.
Answer
Small molecular substances typically have low melting points and boiling points because they are held together by weak intermolecular forces, which require less energy to overcome compared to stronger covalent bonds.
Explanation
This answer effectively links the properties of small molecular substances to the strength of intermolecular forces, demonstrating the student's ability to apply knowledge of bonding to explain observable properties. The question assesses understanding of the concepts involved.
Common mistake
Confusing Intermolecular Forces with Covalent Bonds
Students often state that covalent bonds are broken when small molecular substances melt or boil.
Students should clarify that it is the weak intermolecular forces that are overcome during melting or boiling, not the covalent bonds within the molecules.
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