Introductory information Fall 2017

Physical properties Property Description Examples Electrical conductivity Ability to carry electricity Copper wiring Heat conductivity Ability to transfer energy as heat Aluminum pots and pans Density Mass-to-volume ratio of a substance (how tightly packed a substance is) Lead sinkers for fishing Melting point Temperature at which solid changes to liquid Ice  liquid water Boiling point Temperature at which liquid changes to gas Liquid water  vapor Malleability Ability to be hammered or beaten into thing sheets Silver jewelry Ductility Ability to be drawn into a thin wire Tantalum dental tools

CHEMICAL PROPERTIES A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. Examples: flammability, reactivity with other chemicals; enthalpy of formation; heat of combustion; oxidation states; chemical stability; types of chemical bonds that will form Scientists use chemical properties to predict whether a sample will participate in a chemical reaction. Chemical properties may be used to classify compounds and find applications for them. https://en.wikipedia.org/wiki/Chemical_property http://chemistry.about.com/od/matter/a/Chemical-Properties.htm

Classification of matter www. chemistrytutors Classification of matter www.chemistrytutors.net/wp-content/uploads/20...

Temperature scales and conversions Fahrenheit Celsius (SI system) ° F = 1.8(°C)+ 32 ° C = (5/9)(°F-32) Kelvin (Absolute) Temperature scale K = ° C + 273 Temperature scales and conversions

Celsius Temperature Scale The Celsius temperature scale “centigrade" scale ("consisting of or divided into 100 degrees.“) Andres Celsius (Swedish;1701-1744) developed the centigrade scale for scientific purposes. 100 degrees between freezing point (0˚C) & boiling point (100˚C) of pure water at sea level. An international conference on weights and measures voted to name the centigrade scale after its inventor in 1948.

The Kelvin scale Based on the Celsius scale, but has no negative numbers. Zero on the Kelvin scale is considered to be absolute zero; that is, the point at which all-molecular motion stops. K = °C + 273