BEAT Chemistry! (BE Able To): Matter Differentiate between a chemical and a physical change. Give three examples of each. Refer to your homework and notes if you need help with examples. Physical Change Chemical Change Definition: Definition: A change in a substance that does not Transformation of one or more substances change the identity of the substanc into a different substance with different properties. Examples: Cutting an apple Candle wax melting The volatile oils from the tropical plant leaf evaporated quickly. Examples: The wick of a candle burning Water seeped through the roof causing the old stove to rust Acid rain weathering away limestone Which of the following processes are physical changes (P)? Which are chemical changes (C) ? A. Combustion= C E. Breaking a compound into elements= C B. Ice melts= P F. Elements forming a compound= C C. Electrolysis= C G. Iron undergoes oxidation= C D. Water is converted to steam= P H. Acid on limestone produces carbon dioxide gas= C Differentiate between a chemical and a physical property. Give three examples of each. Refer to your homework and notes if you need help with examples. Physical Property Chemical Property Definition: Definition:\ A property that can be observed and a property that can only be observed by measured without changing the changing the type of substance. substance. Examples Examples: Density Blue Color Solubility Melting point Supports combustion Sour taste Reacts with acid to form H2 Reacts with water to form a gas Luster Neutralize an acid Odor Identify the following properties as physical or chemical. Physical Chemical Combustion Density Flammability Solubility Supports combustion Melting point 2012-2013 C P C P C P Physical Chemical Odor Luster Neutralize an acid Boiling point Reacts with water to form a gas Reacts with acid to form H2 Textbook Chapter 1 P P C C P C C BEAT Chemistry! (BE Able To): Matter Describe the separation lab you performed and what the key concept/learning was from the lab. You can physically separate a homogeneous and heterogeneous mixture using filtration, evaporation, and magnetism Differentiate between an extensive and intensive physical property. Give three examples of each. Refer to your homework and notes if you need help with examples. Intensive Property Extensive Property Definition: Definition: Does not depend upon the amount of Depend upon the amount of matter matter present, and remains constant present Examples: density, boiling, freezing, melting points, conductivity, solubility, magnetism Examples: mass, volume, heat energy, length Differentiate between a homogenous mixture and a heterogeneous mixture. Give three examples of each. Heterogeneous mixture Homogeneous mixture Definition: Not uniform in composition Definition: Solution. Uniform in composition Examples: muddy water Pizza Chex mix Examples: sugar + pure water (C12H22O11 + H2O) brass (Cu mixed with Zn) Differentiate between an element and a compound. Give three examples of each. Element Compound Definition: Definition: simplest kind of matter Compounds are substances that can be broken All one kind of atom down by a chemical change Atoms of two or more different elements that have been combined in a fixed proportion. Examples: iron filings (Fe) magnesium (Mg) Hydrogen, H2 2012-2013 Examples: limestone (CaCO3) acetylene (C2H2) Textbook Chapter 1 BEAT Chemistry! (BE Able To): Matter What is the difference between a mixture and a pure substance? Draw a graphic organizer. It must include a pure substance, mixture, element, compound, heterogeneous mixture, and homogeneous mixture. Explain different ways to separate a heterogeneous mixture and a homogeneous mixture. Heterogeneous mixture- filtration, magnetism, Homogeneous mixture- distillation, evaporation Explain different ways to separate a compound and an element. Elements cannot be chemically or physically separated. Compounds can only be chemically separated Examples: Electrolysis, Hydrolysis, Differentiate between a solid, liquid, and a gas. Explain their movement, volume and shape. Shape Solid Definite shape Particles tightly packed Liquid Take the shape of their container. Particles loosely packed Definite volume Volume Define volume Particle movement Vibrate in place. Strong Move around. More energy than solid attraction holding particles them together Draw a picture of the particles 2012-2013 Textbook Chapter 1 Gas Take the shape of their container. Particles spread far apart Take the volume of their container Move around very fast. No attraction holding them together. Lots of energy