A reaction has an activation energy of 120 kJ mol⁻¹ in the forward direction and 160 kJ mol⁻¹ in the reverse direction. What is ΔH for the forward reaction?

1. A Option A: +280 kJ mol⁻¹
2. B Option B: −280 kJ mol⁻¹
3. C Option C: +40 kJ mol⁻¹
4. D Option D: −40 kJ mol⁻¹

Answer checked 11 October 2026 · How we write and check questions