valence bond theory
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Questions and Answers

What is the term used to describe the distance at which two hydrogen atoms achieve the lowest overall energy of the system?

  • Threshold distance
  • Critical distance
  • Optimum distance (correct)
  • Maximum distance

    • What is the energy difference between the two separated hydrogen atoms and the H2 molecule at the bond distance of 74 pm?

  • 0.74 pm
  • Negative 7.24 J
  • 4.36 × 10^5 J
  • 7.24 × 10^-19 J (correct)

    • What term is used to describe the amount of energy released when a bond is formed?

  • Potential energy
  • Bond energy (correct)
  • Atomic energy
  • Intermolecular energy

    • What does it take to break one H-H bond?

    <p>7.24 × 10^-19 J</p> Signup and view all the answers

    What is the bond length observed for the H2 molecule?

    <p>74 pm</p> Signup and view all the answers

    What is the first C-H bond energy in CH4?

    <p>439.3 kJ/mol</p> Signup and view all the answers

    Which element combination has a bond length of 141.2 pm and an energy of 159 kJ/mol?

    <p>F-F</p> Signup and view all the answers

    What quantity of energy is required to break one mole of H-H bonds?

    <p>$4.36 \times 10^5 J$</p> Signup and view all the answers

    Which bond requires the highest energy to break per mole according to Table 8.1?

    <p>C≡N</p> Signup and view all the answers

    What is the bond length for an H-Cl bond?

    <p>141.4 pm</p> Signup and view all the answers

    How much energy is required to break the first C-H bond in a common paint thinner molecule?

    <p>$375.5 kJ/mol$</p> Signup and view all the answers

    At what distance do the two hydrogen atoms achieve the lowest overall energy of the system?

    <p>$74 pm$</p> Signup and view all the answers

    Which bond has a length of 150.6 pm and an energy of 347 kJ/mol?

    <p>C-C</p> Signup and view all the answers

    What is the energy difference between the energy minimum and the energy of two separated atoms at the bond distance of 74 pm for the H2 molecule?

    <p>$7.24 \times 10^{-19} J$</p> Signup and view all the answers

    Which bond has a length of 160.9 pm?

    <p>H-I</p> Signup and view all the answers

    What is the energy required to break the first C=O bond?

    <p>$745 kJ/mol$</p> Signup and view all the answers

    What is the energy required to break one mole of H-H bonds?

    <p>4.36 \times 10^5 J</p> Signup and view all the answers

    What is the bond energy difference between breaking the first C-H bond in CH4 and in H-CH2C6H5?

    <p>63.8 kJ/mol</p> Signup and view all the answers

    What is the bond length of the C≡C bond?

    <p>120.8 pm</p> Signup and view all the answers

    How much energy is required to break the Cl-Cl bond per mole?

    <p>243 kJ/mol</p> Signup and view all the answers

    What is the energy difference between the energy minimum and the energy of two separated hydrogen atoms at the bond distance of 74 pm for the H2 molecule?

    <p>7.24 \times 10^{-19} J</p> Signup and view all the answers

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