M- Texas Woman University... x C Chegg study l Guided sol... X /biscm 3145127 mi
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M- Texas Woman University... x C Chegg study l Guided sol... X /biscm 3145127 ming-com Ga e ated, and what is the total potential? pling 4/26/2017 11:ss PM 767/100 4/19/2017 06:49 PM Gradebook O Assignment Information Attempts score Print Calculator Periodic Table Available From: 3/31/2017 12:00 AM 17 Question 24 of 3 4/26/2017 55 PM Due Date: 18 100 Map Sapling Learning Points Possible: 19 Grade Category: Graded A Cr(s) (aq)llFe3 (a Fe(s) galvani cell has a standard cell potential of 0.700 V. Calculate the Gibbs c Description change at 25 C when 2.34 g of iron is deposited. Assume the concentrations in the cel 20 1 remain at the standard state values of 1 M through the entire deposition process. Policies: Homework Number You can check your answers. AG 100 You can view solutions when you complete or give Calculate the maximum amount of work done by the cell on its surroundings. up on any question. 20 You can keep trying to answer each question until Number 24 0 you get it right or give up. 99 You lose 5% of the points available to each answer AO Previous ® Give Up & View solution Checks Answer Next Exit in your question for each incorrect attempt at that 100 Start by determining the amount of charge transferred during the deposition of the iron. 27 Textbook o Help With This Topic oweb Help & Videos O Technical Support and Bug Reports 7:09 PM Ask me anything 4/19/2017Explanation / Answer
Fe3+ (aq.) + 3e- ---------> Fe(s)
From the above, to deposit 1mol or 55.8 g. of iron, it needs 3 mol of electrons
then, to deposit 2.34 g. of iron, it needs 2.34 * 3 / / 55.8 = 0.126 mol of electrons
And it is given that the cell is at standard condition,
Therefore, DeltaG0 = - n F E0cell
= - 0.126 * 96500 * 0.700
= - 8511.3 J
= - 8.51 kJ
DeltaG is defined as the maximam non expansible work done by the system. So, if deltaG is negative, it is equal to maximum work done by the system
So, w = 8.51 kJ
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