Given the half-cell reactions:2H^+ + frac{1}{ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The overall corrosion reaction is: $Fe(s) + 2H^+ + \frac{1}{2}O_2 	o Fe^{2+} + H_2O(l)$.The standard cell potential is calculated as: $E^o_{cell}

Vedclass · Accepted Answer

$-322$

Vedclass · Answer

(A) The overall corrosion reaction is: $Fe(s) + 2H^+ + \frac{1}{2}O_2 	o Fe^{2+} + H_2O(l)$.The standard cell potential is calculated as: $E^o_{cell} = E^o_{cathode} - E^o_{anode}$.$E^o_{cell} = 1.23 \ V - (-0.44 \ V) = 1.67 \ V$.The Gibbs free energy change is given by: $\Delta G^o = -nFE^o_{cell}$.Here,$n = 2$ (number of electrons transferred),$F = 96500 \ C/mol$.$\Delta G^o = -2 	imes 96500 	imes 1.67 \ J/mol$.$\Delta G^o = -322310 \ J/mol = -322.31 \ kJ/mol$.Rounding to the nearest integer,the value is $-322 \ kJ$.

Given the half-cell reactions:
$2H^+ + \frac{1}{2}O_2 + 2e^- \to H_2O(l), E^o = 1.23 \ V$
$Fe^{2+} + 2e^- \to Fe(s), E^o = -0.44 \ V$
Calculate the value of $\Delta G^o$ in $kJ$ for the overall corrosion reaction.

Similar Questions

Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it

Identify the correct statement.

The chemical formula of rust is:

Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because

To protect iron against corrosion,the most durable metal plating on it is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Given the half-cell reactions:$2H^+ + \frac{1}{2}O_2 + 2e^- \to H_2O(l), E^o = 1.23 \ V$$Fe^{2+} + 2e^- \to Fe(s), E^o = -0.44 \ V$Calculate the value of $\Delta G^o$ in $kJ$ for the overall corrosion reaction.