Unité 1.2: Les états de la matière PART 2: Les changements d'état

Kinetic Molecular Theory00:00:19

Introduction to how heat affects molecular energy. Adding heat increases kinetic energy and spacing between molecules, while cooling decreases them. This leads to endothermic or exothermic processes.

Types of Molecular Movement00:01:37

Explanation of vibration (present in all states), rotation (liquid and gas), and translation (gas only). The ability to perform these movements depends on the state of matter and molecular spacing.

Phase Changes: Endothermic00:03:01

Review of phase changes that require heat absorption: fusion (solid to liquid), vaporization/boiling (liquid to gas), and sublimation (solid to gas, like dry ice).

Phase Changes: Exothermic00:04:28

Review of phase changes that release heat: solidification (liquid to solid), condensation (gas to liquid), and deposition (gas to solid, forming frost).