WAEC - Chemistry (2001 - No. 16)
What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g); ∆H = - 363 kJ mol-1
lonization energy
Electron affinity
Dissociation energy
Heat of atomization
Selitys
Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom to form an anion.
From the reaction, an electron is added to a neutral atom, Cl, and an anion Cl- is formed. Therefore, the correct answer is option B