Effects of Forces Between Molecules (AQA A-Level Chemistry): Flashcards
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What physical properties are affected by IMFs?
What physical properties are affected by IMFs?
Boiling/melting points, density, solubility
Effect of stronger IMFs on boiling/melting points
Effect of stronger IMFs on boiling/melting points
Higher boiling and melting points
Group 6 hydrides b.p. trend down group
Group 6 hydrides b.p. trend down group
Increases down the group
Why does Group 6 hydride b.p. increase down group?
Why does Group 6 hydride b.p. increase down group?
Larger atoms, more electrons, stronger van der Waals forces
Why does have unusually high boiling point?
Why does have unusually high boiling point?
Hydrogen bonding
Boiling point of
Boiling point of
Around -60°C
Boiling point of
Boiling point of
100°C
Density of ice compared to liquid water
Density of ice compared to liquid water
Less dense
Structure of ice
Structure of ice
Regular 3D lattice, each molecule H-bonded to 4 others
Why does ice float on water?
Why does ice float on water?
Less dense due to open H-bonded structure