Phase changes are physical processes where matter transitions between solid, liquid, and gaseous states. These transitions occur when energy is added or removed, affecting the arrangement and movement of molecules. Key phase changes include melting, freezing, vaporization, condensation, sublimation, and deposition. Understanding these changes is crucial for grasping thermodynamics and intermolecular forces in chemistry. Remember, during a phase change, the temperature remains constant as energy is used to overcome intermolecular forces rather than increase kinetic energy.
Match the term with its correct definition:
(Answers: 1-2, 2-3, 3-5, 4-4, 5-1)
During a phase change, the __________ remains constant because the energy is used to overcome __________ __________ rather than increase the __________ energy of the molecules. For example, when water boils, the temperature stays at __________ °C until all the water has turned into __________. This is because the heat added is breaking the hydrogen bonds between water molecules.
(Answers: temperature, intermolecular, forces, kinetic, 100, steam)
Explain how intermolecular forces influence the temperature at which a substance changes its phase. Provide examples to support your answer.
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