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Transcription

1 o 0 Iÿtÿÿeÿ/ÿrh Jÿtcket Tÿlchÿwÿeÿ

2 Elements, Compounds, and Mixtures Classify each of the pictures below by placing the correct label in the blanks below: A= Element D-- Mixture of compounds B= Compound E= Mixture of elements and compounds C= Mixture of elements Each circle represents an atom and each different color represents a different kind of atom. If two atoms are touching then they are bonded together. OO O O0 0 O O 1) 2) o 4) 5)ÿ 6)ÿ (Z) (30 cp8 cp8 co co 7)ÿ d) qÿ cz c8 8o:)8 m co ÿ 10) ÿ % c (b 8b 9)ÿ 12) 13) 14) 15)

3 Name CLASSIFICATION OF MATTER Period Determine the following information for each material listed below. You may need to use the Internet to research some of these substances. Category 1 : State of Matter (Solid, Liquid, or Gas) Category 2: Pure Substance or Mixture Category 3: If the material is a pure substance, list whether it is an element or compound. If the material is a mixture, list whether homogeneous or heterogeneous. Substance Category I Category 2 Category 3 silicon silicone 24K gold 14K gold air granite brass sugar/water solution glucose (C6H1206) carbon dioxide hydrogen gas (H2) chocolate chip cookie diamond Italian salad dressing magnesium ammonia (NU3) aluminum copper sulfate (CuSO4) distilled water tap water Propel fitness water OJ with extra pulp steel

4 _ ;c PROPERTUES Name: Tea6ÿ Date: Period: Physical properties of matter are categorized as either intensive or extensive. Categorize each of the situations below by placing a,,.,ÿ;7 ', in the appropriate box. Intensive properties do not depend on the amount of matter present. Extensive properties d go depend on the amount of matter )resent. Intensive Extensive Situation Wildberry KooI-Aid is red. The average length of a diamondback rattle snake is 5 feet. Diamond is the hardest naturally occurring substance known. Sodium is a soft metai that can be cut easily with a table knife. Gold leaf is gold pounded into extremely thin sheets. It is commonly used to decorate art. Copper can be drawn into wire and is therefore a useful metal in the e eÿ9trical industry. A person weighing 135 Ibs. on earth will weigh Ibs. on the moon. Below C, nitrogen freezes and becomes a solid. Above C, nitrogen boils and becomes a gas. The volume of H20 in most disposable water bottles is 500 ml. The density of gold is grams/crrrÿ. The density of fool's gold (pyrite) is 5g/cm3. Dry ice (frozen carbon dioxide) has a surface temperature of F or-78.5 C. Notes Rings, necklaces, bracelets, and earrings are usually made from lustrous (shiny) metals. Copper cookware is expensive because copper reacts quickly to temperature change. After payday, the mass of my teacher's wallet is g. Reflections: Revised 6/17/10 Page 1 of 1

5 Name Per. Chemical or Physical Changes Worksheet _Physical Chanqe: (no new substance) Chemical chancje: (new substance) 1. size change 5. temperature change 2. shape change 6. a gas/odor produced 3. phase change 7. color change 4. mixture created 8. light produced 9. a precipitate formed Label each of the following as a chemical (C) or a physical (P) change. In the second blank give a reason why. (Choose from the list above; just write the number that corresponds.) 1. Boiling water is a 2. Rust forming on a nail is a because 3. Tearing your clothes is a because 4. Burning gas in the Bunsen burner is a 5. Tarnished silver is a 6. Melting a popsicle is a 7. Lighting a match is a 8. Mixing vinegar and oil is a 9. Mixing vinegar and baking soda is a 10. Baking a cake is a 11. Making a chair is a 12. Burning a candle is a 13. Dissolving salt in water is a 14. Souring of milk is a 15. Freezing of ice cream is a 16. Sublimation of dry ice is a 17. Defrosting of meat is a 18. Baking a pie crust is a 19. Putting paper through a shredder is a 20. Explosion of TNT is a

6 Name: Waterworld Warm-up: Suppose a quantity of rainwater occupies a volume of 1 ml.. How would this volume change if the rainwater became vapor? Explain your thinking. Period: When water changes phase, what other changes take place? Name at least three changes. Part I: Comparing Densities Densities of various substances have been labeled in the Density Landscape picture. cloud water vapor snow subliming helium H,O (s), from snow, blimp 0.5 g/ml H20 (g), g/rlÿ g/ml air at 3000 m above sea level 0,00091 g/ffd_, molten lava 2.2 g/ml rain H+O (I), 1.00 g/ml solid lava 2.4 g/ml ice H20 (s), 0.92 g/ml mine shaft leading to gold, Au (s), 19.3 g/ml lake H20 (1), 1.00 gtml air at sea level o,oo12 g/me fire extinguisher containing dry ice, carbon dioxide subliming aluminum cooler liquid COÿ (s), from dry ice, CO2 (g), AI (s), COs (1), 1+2 g/ml 1.6 g/ml g/ml 2.70 g/ml Use the drawing to assist you in answering the following questions: 1. On the basis of density, why are gases in the atmosphere? 2. Ice floats on liquid water because ice has a lower density. Is this consistent with the relationship between the densities of solid and liquid lava? Solid and liquid CO2? 3. Do you expect a chunk of dry ice to float on liquid carbon dioxide? Why or why not? 4. What will happen to an ice cube placed in oil?

7 5. What is the volume of each of the following in ml? a g of rain c. 1000gofice b g of snow d g of water vapor Part II: Summarizing Questions Note: The density of solid lead is g/ml; densities of other substances can be found in the diagram on the previous page. 1. Name a common object that has: a. low density and small volume. b. low density and large volume. c. high density and small volume. d. high density and large volume.. One lead cube has an edge 1.0 cm long; a second lead cube has an edge 2.0 cm long. a. Of mass, volume, and density, what properties of the two cubes are different? The same? b. What is the volume of each cube? Show work. c. What is the mass of each cube? Show work.. You are given equal masses of solid lead, aluminum, gold and water. Arrange these substances in order of increasing volume.. You are given equal volumes of solid lead, aluminum, gold and water. Arrange these substances in order of increasing mass. 5. Calculate the mass of each of the following in grams: a. 10mLofoil b. 5 ml of liquid C02 c. 10 cm3 of molten lava (1 cm3 = 1 ml)

8 Specific Heat Worksheet q=(mass)(c4(at) Units for specific heat = J g. C 1. What is the specific heat of a substance that absorbs 2.5 x 103 joules of heat when a sample of 1.0 x 104 g of the substance increases in temperature from 10.0 C to 70.0 C? 2. How many grams of water would require 2.20 x 104 joules of heat to raise its temperature from 34.0 C to C? The specific heat of water is 4.18 J/g. C 3. If 200. grams of water is to be heated from 24.0 C to C to make a cup of tea, how much heat must be added? The specific heat of water is 4.18 J/g. C 4. A block of aluminum weighing 140. g is cooled from 98.4 C to 62.2 C with the release of 1080 joules of heat. From this data, calculate the specific heat of aluminum.. A cube of gold weighing 192.4g is heated from 30.0 C to some higher temperature, with the absorption of 226 joules of heat. The specific heat of gold is J/g. C. What was the final temperature of the gold? q