ElectrochemistryMedium
Question
Assuming that hydrogen behaves as an ideal gas, what is the EMF of the cell at 25°C if P1 = 600 mm and P2 = 420 mm: Pt | H2 (P1) | HCl | H2 (P2) | Pt? [Given: 2.303 RT/F = 0.06, log 7 = 0.85]
Options
A.−0.0045 V
B.−0.0 V
C.+0.0045 V
D.+0.0015 V
Solution
Net cell reaction = $H_{2}\left( P_{1} \right) \rightleftharpoons H_{2}\left( P_{2} \right)$
$E_{cell} = - \frac{0.06}{2}.\log\frac{420}{600} = + 0.0045\text{ V}$
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