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Chemistry 120. Outline Matter Classification Properties Changes Laws of Conservation . Chapter 2: Matter and Energy. Representations of Matter: Macroscopic, Microscopic and Particulate. Figure 2-1 p20. How do the three phases of matter compare? . Figure 2-6 p25. What is an element?.

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Chemistry 120

Chemistry 120

  • Outline

  • Matter

    • Classification

    • Properties

    • Changes

  • Laws of Conservation

Chapter 2: Matter and Energy


Representations of Matter:Macroscopic, Microscopic and Particulate

Figure 2-1 p20



What is an element
What is an element?

Cannot be separated chemically into simpler substances.

Aluminum metal


What is a compound
What is a compound?

Can be separated chemically into simpler substances.





Elements and compounds particulate and macroscopic views of elements and compounds
Elements source? and CompoundsParticulate and Macroscopic Views of Elements and Compounds:


Elements and compounds particulate and macroscopic views of elements and compounds1
Elements source? and CompoundsParticulate and Macroscopic Views of Elements and Compounds:


Elements and compounds particulate and macroscopic views of elements and compounds2
Elements source? and CompoundsParticulate and Macroscopic Views of Elements and Compounds:




Example classification of matter
Example – Classification of Matter differ?

  • Classify a plastic bottle as a

    A. Element

    B. Compound

    C. Heterogeneous mixture

    D. Homogeneous mixture


Example classification of matter1
Example - differ? Classification of Matter

  • Classify root beer float as a

    A. Element

    B. Compound

    C. Heterogeneous mixture

    D. Homogeneous mixture


Example classification of matter2
Example - differ? Classification of Matter

  • Classify water as a

    A. Element

    B. Compound

    C. Heterogeneous mixture

    D. Homogeneous mixture



What techniques can be used to separate mixtures
What techniques can be used to separate mixtures? differ?

Distillation

Chromatography

Filtration


How do changes of state alter chemical composition? differ?

Vaporization Liquid to gas transition Condensation Gas to liquid transition

Melting Solid to liquid transition Freezing liquid to solid transition

Sublimation Solid to gas transition Deposition Gas to solid transition





Example physical and chemical properties
Example – Physical and Chemical Properties differ?

  • Salt melts at 800.7 °C. Is that a

    A. Physical property?

    B. Chemical property?


Example physical and chemical properties1
Example – Physical and Chemical Properties differ?

  • Mercury is poisonous. Is that a

    A. Physical property?

    B. Chemical property?


Example physical and chemical properties2
Example – Physical and Chemical Properties differ?

  • Salt is granular and white. Is that a

    A. Physical property?

    B. Chemical property?


Example physical and chemical properties3
Example – Physical and Chemical Properties differ?

  • Alka-Seltzer tablets form bubbles in water. Is that a

    A. Physical property?

    B. Chemical property?


Example physical and chemical change
Example – Physical and Chemical Change differ?

  • Recycling plastic is a

    A. physical change.

    B. chemical change.


Example physical and chemical change1
Example – Physical and Chemical Change differ?

  • Pouring vinegar on baking soda, which produces bubbles is a

    A. physical change.

    B. chemical change.


Example physical and chemical change2
Example – Physical and Chemical Change differ?

  • Grinding aspirin tablets to a fine powder is a

    A. physical change.

    B. chemical change.


Example physical and chemical change3
Example – Physical and Chemical Change differ?

  • Forging of iron is a

    A. physical change.

    B. chemical change.


Example physical and chemical change4
Example – Physical and Chemical Change differ?

  • Fruit ripening is a

    A. physical change.

    B. chemical change.


Example physical and chemical change5
Example – Physical and Chemical Change differ?

  • Burning wood is a

    A. physical change.

    B. chemical change.


Example physical and chemical change6
Example – Physical and Chemical Change differ?

  • Dissolving salt in water is a

    A. physical change.

    B. chemical change.


Example physical and chemical change7
Example – Physical and Chemical Change differ?

  • Alcohol burning is a

    A. physical change.

    B. chemical change.



Example law of conservation of mass
Example – Law of Conservation of Mass differ?

  • If 10.0 g of calcium carbonate, CaCO3, is decomposed by heating to 5.6 g of calcium oxide, CaO, and carbon dioxide, CO2. How many grams of carbon dioxide gas are evolved?

    heat

    CaCO3 (s)  CaO (s) + CO2 (g)


Conservation laws
Conservation Laws differ?

Common Events in which Energy Changes

from One Form to Another:


Example law of conservation of energy
Example – Law of Conservation of Energy differ?

  • Uranium converts water to steam is _____ energy released to _____ energy absorbed.

    A. nuclear, heat

    B. heat, mechanical

    C. mechanical, mechanical

    D. mechanical, electrical


Example law of conservation of energy1
Example – Law of Conservation of Energy differ?

  • Steam drives a turbine is heat energy _______ to mechanical energy _________.

    A. absorbed, absorbed

    B. released, absorbed

    C. absorbed, released

    D. released, released


Albert einstein
Albert Einstein differ?

p39


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