PPT-HOW DO WE KNOW A CHEMICAL CHANGE/REACTION HAS OCCURRED?

EVIDENCE of a CHEMICAL REACTION aka a CHEMICAL CHANGE T he decomposition of hydrogen peroxide H 2 O 2 2 H 2 O 2 2 H 2 O O 2 http wwwyoutubecomwatchv4N0m95PExHY. . ACTIVITIES. 1.. . Blue Bottle. 2. Foam Column. Solid Reaction. Flame Tests. Burning Magnesium. Carbon Pillar. Skills Focus:. Making Observations. Qualitative vs. Quantitative. Aim: To find out the different signs of a chemical . Polyurethane foam was created during WW II to insulate refrigerators and airplanes. It replaced balsa wood and because this polymer is cheaper, easier to shape, man-made and abundant, it has been used in many practical applications. We find it in furniture cushions, shoe soles, insulating materials, adhesives, flotation devices, cellular scaffolding for bone regeneration, and acoustical vibration control. And that is the short list.. Chemical change. . Reactions with acid. . Reactions with oxygen . 7F. 7F Simple chemical reactions. Chemical change. . 7F Simple chemical reactions. 7F Chemical change – Changing materials. How many different materials can you see in this bedroom?. Theme: . Changes and Reactions . LecturePLUS Timberlake. 2. color. melting point. boiling point. electrical conductivity. specific heat. density . state (solid, liquid, or gas). . 10/20/14. What are Physical Properties?. Physical properties can be . observed. and measured without changing the . identity. of the substance. . Phase. Changes: . Melting. Point: the temperature at which a substance . . October 14, 2014. . Ms. Smith. Mrs. . Malone. DO NOW. :. Date. : . October 14, 2014. TEKS: . 6.8B calculate density to identify an unknown substance. Get out your . gold Do Now sheet. Put your . CB and agenda on your desk. 1-12-16. Bell Work 1-12-16. When air is heated, it expands and rises. Hot-air balloon pilots use this phenomena to their advantage. These pilots use a gas-flame blower to increase the temperature of the air inside the balloon making the balloon rise. . Equations, and Reactions. Chemical Change:. Occurs when one or more substances are changed into new substances with different properties; cannot be undone by physical means. Chemical Change is:. Chemical Change is not:. Ionic compounds can form from transition metals. Transition metals do not always follow the patterns that we discussed. Can have more than one oxidation number (charge. ). To identify the charges of transition metals, roman numerals are placed in their name, directly after the transition metal. Chemical Reactions. A chemical reaction . is the process by which one or more substances change into one or more new substances.. Reactants . are the original substances in a chemical reaction.. Products . Demo . At the start:. Luminol. solution: . blue . liquid. Hydrogen peroxide: clear liquid. What we saw:. Glowing blue color and then an ugly brown color. Bubbles. Temperature rose about 7-8 ºC. Signs of a chemical reaction: Energy change (light, heat), gas formation, color change. Evidence of a chemical reaction includes:. Chemical Reaction. 1) Change in color / light. 2) Change in temperature. Evidence of a chemical reaction includes:. Chemical Reaction. 1) Change in color / light. Learning Target:. Be able to calculate the amount of energy absorbed or released during a chemical or physical change.. Learning Outcomes:. Know how to apply the 1. st. Law of Thermodynamics to chemical reactions. . Chemical Reactions. Chemical reactions occur every minute of every day. . Some are very fast, such as the reaction of sodium with water. . Others are very slow, such as iron rusting. . Some are somewhere in-between, such as milk going sour. .