EARTHSS 23 Study Guide - Midterm Guide: Micrometer, Fly Ash, Soot
14 Feb 2017
School
Department
Course
Professor
Document Summary
Air: a mixture of gas and particles composed of atoms. Pollutants: gases and particles resulting from human activities. Air pollution: buildup in the air of gases and/or aerosol particles, as a result of anthropogenic emissions, in concentrations sufficiently high to cause damage to humans, plants, animals, other life forms, ecosystems, structures, or works of art. Atom: a nucleus with positively-charged protons and zero-charged neutrons surrounded by negatively charged electrons in orbit around it. Molecule: an electrically neutral group of two or more atoms held together by (covalent) chemical bonds. If it has more than one element then it is a compound. Particle: aggregate of atoms and/or molecules (liquid and/or solid phase) bonded together (bigger than an individual gas molecule) Aerosol: mixture of solid, liquid, or mixed-phase particles suspended in air. Enthalpy: more energy, change state, solid to liquid to gas. Bimolecular thermal decomposition reaction (use of catalyst) Unimolecular photolysis reaction (hit by ray of light and reacts)
