KMT & Phase Changes Recap

KMT & Phase Changes Recap

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Kinetic Theory: Gases

• High Kinetic Energy

• Low Intermolecular Forces

• High Entropy

• No definite volume

• Takes shape of container

Kinetic Theory: Liquids

• Medium Kinetic Energy

• Medium Intermolecular Forces

• Medium Entropy

• Definite volume

• Takes shape of container

Kinetic Theory: Solids

• Low Kinetic Energy

• High Intermolecular Forces

• Low Entropy

• Definite volume

• Definite shape

Multiple Choice

Which state of matter has the highest kinetic energy?

• solids

• liquids

• gases

Multiple Choice

Which state of matter has the highest intermolecular forces?

• solids

• liquids

• gases

Multiple Choice

Which state of matter has the highest entropy?

• solids

• liquids

• gases

Endothermic Phase Changes

• Heat is absorbed

• Particles move faster

• Increased kinetic energy

• Decreased intermolecular forces

• Increased entropy

• Examples: melting, vaporization, sublimation

Exothermic Phase Changes

• Heat is released

• Particles move slower

• Decreased kinetic energy

• Increased intermolecular forces

• Decreased entropy

• Examples: freezing, condensation, deposition

Multiple Select

Which phase changes are exothermic?

• melting

• freezing

• vaporization

• condensation

Multiple Select

Which phase changes have an increase in entropy?

• melting

• freezing

• vaporization

• condensation