Question

Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction: 2Cu2+(aq) + Ni(s)2Cu+(aq) + Ni2+(aq) Answer: kJ K for this reaction would be _________ than one.

Use standard reduction potentials to calculate the standard free energy change in kJ for the reaction: Sn2+(aq) + Cu(s) Sn(s) + Cu2+(aq) Answer: kJ K for this reaction would be _________ than one.

Answer 1

ANi ; 27/ar), The giren cell reaction is qw 2+ (aq) + Ni (8) = 2w trag) Calkode reaction :~ +2e = 2wt (Reducliom) Anode reaction in 2 wat Ni(3)— Niat,aq) + 2e Cozidalim :: 6° = Ecclhõbe Eamode E vatleut -6° xizo fui = 0.52 -0.26) V = 0.52 +0-26 = 0.78 V. 2 =-150.54 kJ/mol. 1 .. we known standard free energy 40 AC = nForcell na no of elecron is changed F-.96 500 c/mol. : -2796500 0.78 J/mol :-150540 g/mol -- Standard free energy for ne reaction is -150.54 KIJmol. The airen reaction is Snät(29) 4 w(s) - Sm(S) +129) Colhode Reaction in (Redvelion) Anode Reaction Cu(s) cut the ::60 = Econode - Fånode ES no/fm - Fustle = (0,15 - 0.34) ved Similarly ... 46° -- Ecer : - 2*96500 x (-0.19).J/moy Sn2t the e Sn + ze comidalion) Cell :-0.194, +36 6 To glam = 36.86 70 ug/m. Std::. free energy for the reaction in 36.67 kJ/ moto