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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See sample questions for grade 11
Arrange the following bonds in order of increasing bond length: N≡N, N=N, N–N.
Describe how atomic radius affects bond length.
Describe the effect of multiple bonds on bond length and bond energy.
Explain the relationship between bond order and bond length.
Given the following bond energies: C–H = 413 kJ/mol, O=O = 498 kJ/mol, C=O = 799 kJ/mol. Calculate the enthalpy change for the reaction: CH4 + 2O2 → CO2 + 2H2O (use only the given bond energies).
A certain diatomic molecule has a bond length of 74 pm and a bond energy of 436 kJ/mol. If another diatomic molecule has a bond length of 110 pm, predict whether its bond energy is likely to be higher or lower, and justify your answer.
A molecule of ethene (C2H4) contains C–H and C=C bonds. If the average bond energy of C–H is 413 kJ/mol and C=C is 614 kJ/mol, calculate the total energy required to break all the bonds in one mole of ethene.
Consider the following molecules: CO, CO2, and C2H2. Arrange them in order of increasing C–O or C–C bond length and explain your reasoning.
Bond energy is usually expressed in which unit?
(1) J
(2) kJ/mol
(3) mol/L
(4) atm
Which factor does NOT affect bond energy?
(1) Bond order
(2) Atomic size
(3) Electronegativity difference
(4) Molar mass
Which of the following bonds has the highest bond energy?
(1) H–H
(2) O=O
(3) N≡N
(4) F–F
Which of the following has the lowest bond energy?
(1) H–H
(2) Cl–Cl
(3) O=O
(4) N≡N
Bond energy is defined as the amount of energy required to break ________ of a bond in a gaseous molecule.
Fill in the blank: The bond energy of a C–H bond is approximately ________ kJ/mol.
Fill in the blank: The bond length of a triple bond is ________ than that of a single bond between the same two atoms.
Fill in the blank: The bond length of H–F is ________ than that of H–Cl.
True or False: A shorter bond length generally corresponds to a stronger bond.
True or False: The bond energy of a polar covalent bond is generally higher than that of a nonpolar covalent bond between the same atoms.
True or False: The bond length of a C–H bond is shorter than that of a C–C bond.
Yes or No: Is bond energy always positive?
