Which statement correctly compares the energy changes in bond processes?

Use H-H = 436 kJ/mol, Cl-Cl = 243 kJ/mol, H-Cl = 431 kJ/mol. For H₂ + Cl₂ → 2HCl, what is ΔH?

For N₂ + 3H₂ → 2NH₃, which set lists the bonds formed in the products?

A bond-energy calculation uses ΔH ≈ ΣE(bonds broken) − ΣE(bonds formed). Which case gives a negative ΔH?

Use N≡N = 945 kJ/mol, H-H = 436 kJ/mol, N-H = 391 kJ/mol. For N₂ + 3H₂ → 2NH₃, what is ΔH?

A reaction requires 720 kJ to break bonds and releases 910 kJ as new bonds form. What is the overall result?

Use H-H = 436 kJ/mol, F-F = 159 kJ/mol, H-F = 567 kJ/mol. For H₂ + F₂ → 2HF, what is ΔH?

For CH₄ + 2O₂ → CO₂ + 2H₂O, which bonds are broken in the reactants?

When the same type of bond is broken in one step and formed in another, how does its bond energy enter ΔH?

Use O=O = 498 kJ/mol and O-H = 463 kJ/mol. For 2H₂ + O₂ → 2H₂O with H-H = 436 kJ/mol, what is ΔH?

Use C=C = 614 kJ/mol, H-H = 436 kJ/mol, C-C = 347 kJ/mol, C-H = 413 kJ/mol. For C₂H₄ + H₂ → C₂H₆, what is ΔH?

A student says bond breaking releases energy because pieces fly apart. What correction is best?

For H₂ + Cl₂ → 2HCl, which list matches bonds broken and bonds formed?

Use C-H = 413 kJ/mol, O=O = 498 kJ/mol, C=O in CO₂ = 799 kJ/mol, O-H = 463 kJ/mol. For CH₄ + 2O₂ → CO₂ + 2H₂O, what is ΔH?

A reaction absorbs 1,250 kJ to break bonds and releases 1,040 kJ when bonds form. What is the overall result?

Use Cl-Cl = 243 kJ/mol, F-F = 159 kJ/mol, Cl-F = 253 kJ/mol. For Cl₂ + F₂ → 2ClF, what is ΔH?

Which explanation connects a negative ΔH to particles during a reaction?

Use N≡N = 945 kJ/mol, O=O = 498 kJ/mol, N-O in NO = 607 kJ/mol. For N₂ + O₂ → 2NO, what is ΔH?