Bond Energy and Bond Length
Chemistry ⇒ Chemical Bonding and Structure
Bond Energy and Bond Length starts at 10 and continues till grade 12.
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Arrange the following bonds in order of increasing bond length: C–C, C=C, C≡C.
Describe how bond order affects both bond energy and bond length.
Describe how electronegativity difference between two atoms affects bond energy.
Describe the relationship between bond energy and bond length.
The bond energy of a C–C bond is 348 kJ/mol, and that of a C=C bond is 614 kJ/mol. What is the average bond energy per bond in C₂H₄ (ethene), which has one C=C and four C–H bonds (C–H = 413 kJ/mol)?
A molecule of ethyne (C2H2) contains a triple bond between the two carbon atoms. If the bond energy of a C≡C bond is 839 kJ/mol and that of a C–H bond is 413 kJ/mol, calculate the total energy required to break all the bonds in one mole of ethyne molecules.
Describe how the presence of lone pairs on bonded atoms can affect bond length and bond energy, using water (H2O) as an example.
Explain why the bond energy of a C–N bond in methylamine (CH3NH2) is different from that in nitromethane (CH3NO2).
Bond length is measured in which unit?
(1) Kilograms
(2) Nanometers
(3) Angstroms
(4) Liters
Which bond is the longest?
(1) C–C
(2) C=C
(3) C≡C
Which factor does NOT affect bond energy?
(1) Bond order
(2) Atomic size
(3) Electronegativity difference
(4) Number of isotopes
Which of the following bonds has the highest bond energy?
(1) H–H
(2) O=O
(3) N≡N
(4) F–F
Bond energy is defined as the amount of energy required to ______ a bond in one mole of gaseous molecules.
Bond energy is usually expressed in ______ per mole.
Fill in the blank: As the bond order increases, the bond length ______.
Fill in the blank: The bond length of a triple bond is ______ than that of a single bond between the same atoms.
True or False: A shorter bond length generally corresponds to a stronger bond.
True or False: Bond energy can be used to estimate the enthalpy change of a reaction.
True or False: Bond energy is always a positive value.
True or False: The bond energy of a bond is the same as the energy released when the bond is formed.
