GCSE Chemistry Revision "Properties of Small Covalent Molecules"
Freesciencelessons・2 minutes read
Small covalent molecules have low melting and boiling points due to weak intermolecular forces and inability to conduct electricity. Larger covalent molecules exhibit stronger intermolecular forces, resulting in higher boiling points, as seen in the increasing boiling points of alkanes with molecular size.
Insights
- Small covalent molecules have low melting and boiling points due to weak intermolecular forces, making them gases or liquids at room temperature.
- The inability of small covalent molecules to conduct electricity is linked to their lack of an overall electric charge, a crucial concept for exams and further detailed in the revision workbook.
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Recent questions
What are the properties of small covalent molecules?
Small covalent molecules have low melting and boiling points due to weak intermolecular forces, making them gases or liquids at room temperature.
Can small covalent molecules conduct electricity?
Small covalent molecules cannot conduct electricity as they lack an overall electric charge.
How do intermolecular forces affect boiling points?
Boiling points increase with larger covalent molecules due to stronger intermolecular forces.
What is the relationship between molecular size and boiling points?
The boiling points of alkanes increase as molecular size grows, showcasing the correlation between size and boiling points.
Why is it important to understand the properties of small covalent molecules?
Understanding the properties of small covalent molecules is crucial for exam preparation and can be found in detail in revision workbooks.
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Summary
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"Covalent Molecules: Size Impacts Properties"
- Small covalent molecules have low melting and boiling points, making them typically gases or liquids at room temperature. These molecules exhibit weak intermolecular forces, requiring minimal energy to transition from a liquid to a gas state.
- The lack of an overall electric charge in small covalent molecules results in their inability to conduct electricity. Understanding this property is crucial for exam preparation and can be found in further detail in the provided revision workbook.
- As the size of covalent molecules increases, so do the intermolecular forces, leading to higher boiling points. This relationship is exemplified by the increasing boiling points of alkanes as their molecular size grows.
