Consider the following cell reaction :

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

2\text{Fe} (\text{s}) + \text{O}_2 (\text{g}) + 4\text{H}^+ \longrightarrow 2\text{Fe}^{2+} (\text{aq}) + 2\text{H}_2\text{O} (\text{l})

E^{\circ} = 1.67 \text{ V}

[\text{Fe}^{2+}] = 10^{-3} \text{ M}

\text{P}(\text{O}_2) = 0.1 \text{ atm}

and

\text{pH} = 3

, the cell potential at

25^{\circ}\text{C}

is : (1)

1.47 \text{ V}

(2)

1.77 \text{ V}

(3)

1.87 \text{ V}

(4)

1.57 \text{ V}