www-awa. aleks.com O ELECTRONIC STRUCTURE Understanding the definitions of ioniz
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www-awa. aleks.com O ELECTRONIC STRUCTURE Understanding the definitions of ionization energy and el consid following data for phosphorus atomic mass | 30974 electronegativity 2.19 mol kJ mol electron affinity72 kJ mol kJ ionization energy 1011.8 heat of fusion | 0.64 mol You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb Can't be decided with the data given. 1) P(r) P (r) + e yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? n no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): 1Qwrn1 /mil Does the following reaction absorb or release energy? release D absorb Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): | InolExplanation / Answer
1)
P(g) -----------> P+(g) + e
This is the process of ionisation .
The eenrgy required is defined as the ionization energy of P.[ ionization energy the energy required to remove loosely held electron from the outer most shell of a gaseous, isolated atom.]
Thus energy is absorbed in the process.
2) Yes. The ionisation energy is given in the data.
3) The ionisation energy of P is 1011.8 kJ/ mol , is the energy absorbed for one mole of gaseous P atoms to ionise to give one mole of P+ ions and one mole of electrons.
value = 1011.8kJ/mol
4)P(g) +e- --------------> P-(g)
This is an exothermic reaction . that is it releases energy.
Though P has stable half filled configuration of 3P3 , still it can take an extra electron , as in the relatively large 3p orbital the repulsions are are less.
Thus P has higher negative electron affinity than N.
5) yes
6) equal to electron affinity of P = 72kJ/mol
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