Why ionisation energy is always positive

Asked by kusumghosh71 | 21st Aug, 2021, 10:59: AM

Expert Answer:

Ionization energy is the minimum energy required to remove the most loosely bound electron from atom of an element in its ground state. According to IUPAC covention about sign of energy, if energy enters the system, its sign is positive and if energy leaves the system, its sign is negative. In case of ionization energy, energy is always given to the system, hence it is always positive.

Answered by Ravi | 23rd Aug, 2021, 11:57: AM