Li^+ Br^- kJ/mol Li(g) Ei 520 kJ/mol Br(g) Eea –325 kJ/mol

Li^+ Br^- kJ/mol Li(g) Ei 520 kJ/mol Br(g) Eea –325 kJ/mol

 

 

Li 원자가 전자를 Br 원자에게 잃어

고립된 Li^+, Br^-를 만들 때의 에너지 변화를

kJ/mol로 계산하시오.

 

 

Calculate the energy change in kJ/mol

when lithium atoms lose an electron to bromine atoms

to form isolated Li^+ and Br^- ions.

The Ei for Li(g) is 520 kJ/mol;

the Eea for Br(g) is –325 kJ/mol.

 

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ΔE = E_i + E_ea

= (520 kJ/mol) + (–325 kJ/mol)

= 195 kJ/mol

 

 

 

답: +195 kJ/mol