AP®︎ Chemistry: Topic 4.4 Flashcards

Master key terms and definitions for Topic 4.4 of AP Chemistry – Physical and Chemical Changes to help you prep for quizzes and the AP exam.

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Term

Intramolecular Bonds

Definition

Bonds within a substance, such as covalent or ionic bonds between atoms or ions.

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Intramolecular Bonds
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Bonds within a substance, such as covalent or ionic bonds between atoms or ions.

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Intermolecular Forces
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Attractions between separate particles, including hydrogen bonding, dipole forces, and dispersion forces.

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Phase Change
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A physical change between states of matter caused by changing intermolecular attractions.

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Bond Breaking and Bond Formation
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Reactants must break existing bonds and form new ones to rearrange into products.

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Dissolution Of Salt In Water
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An ambiguous process where ionic attractions break and ion-dipole interactions form in solution.

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Ion-Dipole Interactions
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Attractions between ions and polar molecules, such as dissolved ions and water molecules.

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Reversibility Of Physical Changes
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Many can be undone because the substance's chemical identity remains unchanged.

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Chemical Vs. Physical Changes
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Chemical changes alter intramolecular bonds, while physical changes mainly alter intermolecular attractions.

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