CHM 113 Lecture Notes - Lecture 1: Boiling Point, Chemical Energy, Kinetic Energy
Document Summary
Properties and changes that matter undergoes, including energy associated with these changes. Matter: anything that has both mass and volume: ex. ) books, planets, trees, professors, students. Compostition: types and amounts of simpler substances that make up a sample of matter. Properties: characteristics that give each substance a unique identity. Liquid: varying shape that takes up the shape of container, but has a fixed volume. Gas: no fixed shape or volume = does not have a surface. Physical: substance shows by itself without interacting with another substance: ex. ) color, melting point, boiling point, and density. Chemical: substance shows as it interacts and transforms into other substances: ex. ) flammability, corrosiveness. Physical: physical form changes, composition does not: changes in a physical state are reversible by changing the temperature. Physical change: solid state of water becomes liquid state. Particles before and after remain the same which means the composition did not change. Chemical change: electric current decomposes water into different substances.
