Essential Chemistry for IGCSE - Chemical Changes (Section 1 - No. 7)
What does the sign of ΔH (enthalpy change) indicate?
The rate of the reaction
The spontaneity of the reaction
Whether the reaction is endothermic or exothermic
The equilibrium constant.
คำอธิบาย
The sign of ΔH (positive or negative) indicates whether heat is absorbed (endothermic) or released (exothermic).