ΔG° Fe(s) | Fe^2+(aq) || Sn^4+(aq) | Sn^2+(aq) | Pt(s)

ΔG° Fe(s) | Fe^2+(aq) || Sn^4+(aq) | Sn^2+(aq) | Pt(s)

 

 

Calculate ΔG° for the electrochemical cell

Fe(s) | Fe^2+(aq) || Sn^4+(aq) | Sn^2+(aq) | Pt(s)

 

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▶ 표준 환원 전위

> Sn^4+ + 2e^- → Sn^2+ ... E° = +0.15 V

> Fe^2+ + 2e^- → Fe ... E° = –0.44 V

( 참고 https://ywpop.tistory.com/7027 )

 

 

 

E°_cell = E°_red(환원전극) – E°_red(산화전극)

= (환원된 물질의 표준환원전위) – (산화된 물질의 표준환원전위)

( 참고 https://ywpop.tistory.com/4558 )

 

= (+0.15 V) – (–0.44 V) = +0.59 V

 

 

 

ΔG = –nFE_cell

( 참고 https://ywpop.tistory.com/6519 )

 

= –(2) (96500) (0.59)

= –113870 J/mol

= –113.870 kJ/mol

 

 

 

답: –1.1×10^2 kJ/mol