The horizontal bars in a diagram correspond to these average bond energies (in…

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

The horizontal bars in a diagram correspond to these average bond energies (in kJ·mol⁻¹): H–H 436 F–F 158 H–F 565 O–H 463 Use the values shown to calculate ΔH for the reaction below. H₂(g) + F₂(g) → 2 HF(g) (a) +5.36×102 kJ mol−1+5.36 \times 10^{2}\ \text{kJ\,mol}^{-1} (b) −5.36×102 kJ mol−1-5.36 \times 10^{2}\ \text{kJ\,mol}^{-1} (c) −1.07×103 kJ mol−1-1.07 \times 10^{3}\ \text{kJ\,mol}^{-1} (d) −3.32×102 kJ mol−1-3.32 \times 10^{2}\ \text{kJ\,mol}^{-1}

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