Calculate Enthalpy from Bond Energy

Using the table of average bond energies below the image, the ΔH for the reaction in kJ is.....

• + 160 kJ
• -63 kJ
• - 160 kJ
• -217 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Of the bonds below, the C-N bond is the ________ and has the ________ bond energy.

C-N

C=N

C≡N

• strongest ; lowest

• weakest ; lowest

• strongest ; highest

• weakest ; highest

Some average bond enthalpies, in kJ/mol, are as follows:
H-H = 436
Cl-Cl = 242
H-Cl = 431
What is the enthalpy change for the decomposition of hydrogen chloride?
2 HCl --> H₂ + Cl₂

• -184 kJ
• + 184 kJ
• - 247 kJ
• + 247 kJ

Tags

NGSS.HS-PS1-4

Using bond energies, what is the heat of the following reaction?

• -93 kJ/mol

• -1266 kJ/mol

• 1797 kJ/mol

• -1080 kJ/mol

• 732 kJ/mol

Tags

NGSS.HS-PS1-4

What is the heat of reaction for the reaction shown?

• 51 kJ/mol

• -296 kJ/mol

• -728 kJ/mol

• 728 kJ/mol

• 296 kJ/mol

Tags

NGSS.HS-PS1-4

Using bond energies, what is the heat of the following reaction?

• -114 kJ/mol

• -188 kJ/mol

• -6 kJ/mol

• 188 kJ/mol

• -159 kJ/mol

Tags

NGSS.HS-PS1-4