Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

1. Matter and Measurements

Physical Properties

GOB Chemistry

1. Matter and Measurements

Physical Properties

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0:59 minutes

Problem 77c

Textbook Question

Identify each of the following as a physical or chemical property:
c. Gold is a good conductor of electricity.

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Understand the difference between physical and chemical properties: A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity (e.g., color, melting point, conductivity). A chemical property describes a substance's ability to undergo a chemical change or reaction (e.g., flammability, reactivity).

Analyze the statement: 'Gold is a good conductor of electricity.' This describes a characteristic of gold that can be observed without altering its chemical composition.

Recognize that electrical conductivity is a measurable property related to the physical state and structure of the material, not its chemical reactivity.

Conclude that the property described in the statement is a physical property because it does not involve a chemical change or reaction.

Classify the property as a physical property and note that it is related to gold's ability to allow the flow of electric current due to its metallic structure.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Physical Property

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity. Examples include color, melting point, boiling point, and conductivity. These properties help in identifying and describing materials based on their physical state and behavior.

Chemical Property

A chemical property refers to a substance's ability to undergo a specific chemical change or reaction. This includes properties like reactivity with acids, flammability, and oxidation states. Unlike physical properties, observing a chemical property typically involves altering the substance's chemical structure.

Conductivity

Conductivity is a measure of a material's ability to conduct electric current. It is a physical property that varies among different materials; metals like gold are known for their high conductivity due to the presence of free-moving electrons. This property is crucial in applications such as electronics and electrical engineering.

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Describe each of the following as a physical or chemical property:

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Textbook Question

Butane (C₄H₈) is an easily compressible gas used in cigarette lighters. It has a melting point of and a boiling point of -138.4 °C and a boiling point of -0.5 °C. Would you expect a butane lighter to work in winter when the temperature outdoors is 25 °F? Why or why not?

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Multiple Choice

Which of the following is not a physical property?

Pure acetic acid, which gives the sour taste to vinegar, has a melting point of 16.7 °C and a boiling point of 118 °C . Predict the physical state of acetic acid when the ambient temperature is 10 °C .

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Textbook Question

Describe each of the following as a physical or chemical property:

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Textbook Question

Describe each of the following as a physical or chemical property:

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