Chemistry: Temperature Dependence and Phase Changes Quiz
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Questions and Answers

Which topic deals with the calculation of ΔH from a heating curve?

  • Calculating Vapor Pressure in Binary System (correct)
  • Colligative Properties: Theory
  • Ranking Miscibility of Liquids
  • Calculating Molar Solubility from Ksp

    • In which topic do we estimate solubility from Ksp?

  • Colligative Properties: Application
  • Interpreting Net Ionic Equations and Spectator Ions
  • Common Ion Calculation (correct)
  • Determining Reaction Direction from Q and K

    • Which topic involves the interpretation of net ionic equations and spectator ions?

  • Interpreting Net Ionic Equations and Spectator Ions (correct)
  • Gas Solubility in Liquids
  • Selective Precipitation
  • Salt Dissociation in Water

    • Which topic is related to the Clausius-Clapeyron equation?

    <p>van’t Hoff Equation</p> Signup and view all the answers

    What is the sign of ΔH for combustion reactions?

    <p>Negative (-)</p> Signup and view all the answers

    What does ΔSsys indicate when the number of moles increases?

    <p>ΔSsys is positive (+)</p> Signup and view all the answers

    For which phase change does ΔH involve making or breaking IMFs?

    <p>Gas to liquid</p> Signup and view all the answers

    At what temperature does a reaction always happen if ΔHsys and ΔSsys are both positive?

    <p>At high temperatures</p> Signup and view all the answers

    What are the signs of ΔG, ΔH, and ΔS for water condensing at 105°C?

    <p>+, -, -</p> Signup and view all the answers

    What is the relationship between ΔG and ΔHsys?

    <p>No correlation</p> Signup and view all the answers

    Which type of reaction will be the basis for a quiz/exam question?

    <p>Both phase changes and chemical reactions</p> Signup and view all the answers

    What are the signs of ΔH and ΔS for a spontaneous reaction at all temperatures?

    <p>Negative (-) and positive (+)</p> Signup and view all the answers

    When does a reaction always happen?

    <p>At all temperatures if ΔGsys is negative (-)</p> Signup and view all the answers

    What are the signs of ΔG, ΔH, and ΔS for a reaction at low temperatures?

    <p>-,+,-</p> Signup and view all the answers

    When is a reaction nonspontaneous at room temperature if both ΔS and ΔH are positive?

    <p>Water condensation below 100°C</p> Signup and view all the answers

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