Essential Chemistry for IGCSE - Chemical Changes (Section 1 - No. 28)
What is the significance of the negative sign for an energy change (ΔH) in a chemical reaction?
The reaction is endothermic.
The reaction is exothermic.
The reaction is at equilibrium.
The reaction is reversible.
توضیح
A negative ΔH signifies that the reaction releases heat, indicating an exothermic process.