States of Matter and Properties of Substances
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Questions and Answers

Which state of matter has atomic spacing that is close together and definite shape?

  • Plasma
  • Gas
  • None
  • Solid (correct)
  • Liquid

    • Which among the following statements is false?

  • A gas has neither definite shape nor definite volume
  • A liquid has a definite volume but it has no definite shape
  • None (correct)
  • Both solids and liquids are incompressible while gases are compressible
  • A solid has a definite shape and a definite volume

    • A solution is an example of?

  • Heterogeneous mixture
  • Compound
  • Homogeneous mixture (correct)
  • Pure substance
  • Element

    • A pure substance is:

    <p>Composed of only one type of atom or molecule (B)</p> Signup and view all the answers

    How would you classify salt water?

    <p>Mixture-homo (C)</p> Signup and view all the answers

    How would you classify raisin bran?

    <p>Mixture-hetero (E)</p> Signup and view all the answers

    Which of the following is a homogeneous mixture?

    <p>Stainless steel (A)</p> Signup and view all the answers

    Which of the following items is a physical property?

    <p>The odor of spearmint gum (C)</p> Signup and view all the answers

    Physical properties are:

    <p>Those that a substance displays without changing its composition (A)</p> Signup and view all the answers

    Which of the following items is a chemical property?

    <p>The tarnishing of a copper statue (E)</p> Signup and view all the answers

    Which type of energy is associated with motion?

    <p>Kinetic (E)</p> Signup and view all the answers

    Which type of energy is associated with position?

    <p>Potential (E)</p> Signup and view all the answers

    If a particular process is endothermic, the reverse process must be a (an):

    <p>Exothermic process (B)</p> Signup and view all the answers

    What is the value of -25°C on the Kelvin scale?

    <p>248</p> Signup and view all the answers

    What is the value of 335 K on the Celsius temperature scale?

    <p>62</p> Signup and view all the answers

    Flashcards

    Solid state of matter

    A state of matter with tightly packed atoms, maintaining a definite shape.

    Solution

    A homogenous mixture of two or more substances.

    Pure substance

    A substance composed of only one type of atom or molecule.

    Homogenous mixture

    A mixture where the components are evenly distributed.

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    Heterogenous mixture

    A mixture where the components are not evenly distributed.

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    Physical property

    A characteristic of a substance that can be observed without changing its composition.

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    Chemical property

    A characteristic of a substance that describes how it reacts with other substances.

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    Kinetic energy

    Energy associated with motion.

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    Potential energy

    Energy associated with position.

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    Endothermic process

    A process that absorbs heat.

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    Exothermic process

    A process that releases heat.

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    -25°C to Kelvin

    Convert Celsius to Kelvin by adding 273.

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    335 K to Celsius

    Convert Kelvin to Celsius by subtracting 273.

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    Stainless steel

    An example of a homogeneous mixture.

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    Mixture

    A substance containing two or more components not chemically bonded.

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    Study Notes

    States of Matter

    • Solid has closely spaced atoms and retains a definite shape and volume.
    • Gases lack both definite shape and volume, while liquids maintain a definite volume but have no fixed shape.
    • Both solids and liquids are generally incompressible, contrasting with gases, which are compressible.

    Solutions and Mixtures

    • A solution is classified as a homogeneous mixture, meaning its composition is uniform throughout.
    • Pure substances consist of only one type of atom or molecule, differing from mixtures which can contain varying compositions.
    • Saltwater is classified as a homogeneous mixture, while raisin bran is a heterogeneous mixture.

    Properties of Substances

    • Physical properties are characteristics that can be observed without altering the substance's composition, like the odor of spearmint gum.
    • Chemical properties, such as the tarnishing of a copper statue, involve changes in the substance's composition.
    • Energy associated with motion is called kinetic energy, while energy linked to position is potential energy.

    Energy Changes in Reactions

    • An endothermic process absorbs heat energy, while its reverse process is exothermic, releasing heat energy.

    Temperature Scales

    • The conversion from Celsius to Kelvin can be achieved by adding 273 to the Celsius value; for example, -25°C equals 248 K.
    • To convert Kelvin to Celsius, subtract 273 from the Kelvin value; thus, 335 K corresponds to 62°C.

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    Description

    This quiz covers fundamental concepts related to the states of matter, solutions, and mixtures, along with physical and chemical properties of substances. Test your understanding of these essential topics in chemistry and their real-world applications.

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