-Calculeting standard reaction free energy from standard reducto. Shannon dard r

Question

-Calculeting standard reaction free energy from standard reducto. Shannon dard reaction free energy ?Go for the following redox reaction Round your answer to 4 significant digits 2NoW: 21120 () + Zn2. (aq) ?21INO2 (aq) + 2H. (aq) + Zn (s) Ju -100 Deta Mn2+ (aq) 2e Mn (s) MnO2 (s) + 4H (ag) +2eMn2 (aq)+2H20 0) -1-185 1224 Mno4" (aq) +8H (aq) Se-Mn2 (aq)+4H20() 1.587 MnO,-(aq) + 2H20 (I) + 3e. ? MnO2 (s) + 40H_ (aq) e.sss .983 HNO2 (aq) + H. (aa) + e N0(g) + H20(1) N2 (g) + 4H20 (l) + 4e-? 4OH-(aq) + N2H4 (aa) NO3_ (aq) + 4H+ (aq) + 3e-? NO (g) + 2H20 (1) Na (aq)eNa (s) N+ (aq)2Ni (s) 0z (a) + 4H (aq) +42Ho ) 02 (g) + 2H20 () + 4e-? 4OH-(aq) -957

Explanation / Answer

Oxidation reaction

2NO + 2H2O ? 2HNO2 + 2H+ + 2e-

E ox = - 0.983 V

Reduction reaction

Zn2+ + 2e- ? Zn

E red = - 0.7618 V

Overall reaction

2NO + 2H2O + Zn2+ ? 2HNO2 + 2H+ + Zn

E = - 0.983 - 0.7618

= ?1.7448 V

G = - nFE

= 2 x 96500 x 1.7448

= 336746.4 J

= 336.7464 kJ

= 3.367 x 10^2 kJ

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