Ch. 1 - Silberberg, Chapter 1 Keys to the Study of...

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Silberberg, Chapter 1 Keys to the Study of Chemistry (Review) 1.1 Fundamental Definitions Matter: anything that has mass and volume Composition: the types and amounts of simpler substances that make up matter Properties: the characteristics that give each substance its unique identity Two types of properties: a. Physical properties are those a substance shows by itself, in pure form, without changing into or interacting with another substance b. Chemical properties involve a change a change or interaction with another substance Physical change: change in physical form, not composition Chemical change: when a substance is converted into a different substance Example: Ice (solid) -> Water (liquid) -> Steam (gas) All are physical changes, no change in water molecule itself Versus: Water -> hydrogen + oxygen (via an electric current) All are chemical changes (i.e. chemical reaction) Three states of matter: Solid, Liquid and Gas Solids have fixed shape and do not conform to containers that hold them; Liquids have a surface as well, but conform to containers that hold them to the extent of the liquid s volume, forming a surface; Gases conform to the containers shape but fills the container entirely and does not form a surface. Energy: The ability to do work Potential energy: energy due to position of the object Kinetic energy: energy due to motion of the object
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Thermodynamic law: Energy is neither created nor destroyed, as it is always conserved being converted from one form to another (more on this later)
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This note was uploaded on 06/15/2010 for the course CHEM 124 taught by Professor Hascall during the Winter '08 term at Cal Poly.

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Ch. 1 - Silberberg, Chapter 1 Keys to the Study of...

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