Is removing an electron from lithium exothermic?
2018-07-03 1:44 am
Removing an electron from lithium would decrease its potential energy and thus release energy since it would then have a noble gas configuration. I know it takes ionization energy to take that electron away, but isn't the amount of energy released from the decrease in potential energy greater than the ionization energy?
回答 (3)
2018-07-03 2:03 am
Li(g) → Li⁺(g) + e⁻ …… ΔH = Ionization energy > 0
The removal of an electron from lithium atom is endothermic.
A simple explanation is that energy is required to remove the outermost electrons. The removed electron may be through as an excitation from the outermost shell to ∞th shell.
Although the potential energy of Li⁺ ion is lower than that of Li atom, the process is endothermic but not exothermic. This is because the energy used to remove the outermost shell electron is greater than the decrease of potential energy in formation of Li⁺ from Li.
The removal of an electron from lithium atom is endothermic.
A simple explanation is that energy is required to remove the outermost electrons. The removed electron may be through as an excitation from the outermost shell to ∞th shell.
Although the potential energy of Li⁺ ion is lower than that of Li atom, the process is endothermic but not exothermic. This is because the energy used to remove the outermost shell electron is greater than the decrease of potential energy in formation of Li⁺ from Li.
2018-07-03 3:27 am
Removing an electron....
To pry an electron lose from an atom requires energy. Since energy must be put into the ionization of lithium, the process is endothermic.
To pry an electron lose from an atom requires energy. Since energy must be put into the ionization of lithium, the process is endothermic.
2018-07-03 2:01 am
No, it's not exothermic. The ionization energy is the total energy needed, including any changes in potential energy. Ionization is always endothemic.
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