Be sure to answer all parts Calculate AG for the following reaction at 25°C: 3Mg(s) 2A...

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Be sure to answer all parts Calculate AG for the following reaction at 25°C: 3Mg(s) 2A (aq) 3Mg2*(aq) +2Al(s) Enter your answ

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Answer 1

Answer #1

from data table:
Eo(Mg2+/Mg(s)) = -2.372 V
Eo(Al3+/Al(s)) = -1.662 V

As per given reaction/cell notation,
cathode is (Al3+/Al(s))
anode is (Mg2+/Mg(s))

Eocell = Eocathode - Eoanode
= (-1.662) - (-2.372)
= 0.71 V

number of electrons being transferred, n = 6
F = 96500 C
use:
ΔG = -n*F*E
= -6*96500*0.71
= -411090 J/mol
= -411 KJ/mol
Answer: -4.11*10^2 KJ/mol

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Answer 2

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