The enthalpy axis shows reactants high, products low.
Based on the enthalpy diagram, what is the sign of ΔH for the reaction?
- Acheck_circle
Negative; the reaction is exothermic
- B
Cannot be determined from the diagram
- C
Zero; the reaction is at equilibrium
- D
Positive; the reaction is endothermic
Explanation
Products lie below reactants on the enthalpy axis, so the system loses enthalpy and ΔH < 0 (exothermic).