Question detail
Explain why larger molecules tend to have higher melting points and boiling points than smaller molecules.
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 larger molecules tend to have higher melting points and boiling points than smaller molecules.
Answer
Larger molecules have more atoms, which leads to an increase in the strength of intermolecular forces. As the size of the molecule increases, the number of intermolecular forces also increases, requiring more energy to overcome these forces during melting or boiling.
Explanation
This answer is strong because it directly addresses the relationship between molecular size and the strength of intermolecular forces, which is the focus of the question. It tests the student's understanding of how molecular structure affects physical properties.
Common mistake
Confusing Size with Properties
Students often think that larger molecules always have higher melting and boiling points without considering the type of intermolecular forces present.
Emphasize that while larger molecules may have higher melting and boiling points, it is also important to consider the strength of intermolecular forces, which can vary.
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