You visited us 1 times! Enjoying our articles? Unlock Full Access!

Electrochemical Cells, Galvanic Cells

For the Danie...

Question

For the Daniel cell involving the cell reaction ${Z n}_{(s)} + {C u}^{+ 2}_{(a q)} ⇌ {Z n}^{+ 2}_{(a q)} + {C u}_{(s)}$ the standard free energies of formation of ${Z n}_{(s)}$ , ${C u}_{(s)}$ , ${C u}^{+ 2}_{(a q)}$ and ${Z n}^{+ 2}_{(a q)}$ are 0, 0, 64.4 KJ/Mole and -154.0 KJ/Mole, respectively. Calculate the standard EMF of the cell?

2.13 V o l t s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.13 V o l t s

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

2.26 V o l t s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

3.42 V o l t s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $1.13 V o l t s$
$∵ Δ G^{0} = (G_{{Z n}^{2 +}}^{0} - G_{{C u}^{2 +}}^{0})$ $= (- 154 - 64.4) K J / M o l e$
$∴ (- 2 \times E^{0} \times F)$ $= (- 218.4 \times 10^{3})$
$∴ E^{0} = 1.1316 v o l t$

Suggest Corrections

Similar questions

Z n (s) | Z n^{2 +} (a q) | | C u^{+ 2} (a q) | C u (s)

E_{c e l l}

C u (s) | | C u^{+ 2} (a n) | | Z n^{+ 2} (a n | Z n (s)

Z n | Z n^{2 +} (0.001 M) | | C u^{2 +} (0.1 M) | C u

C u / C u^{2 +}

Z n / Z n^{2 +}

{Z n}^{2 +} | Z n

- 0.76 V

{C u}^{2 +} | C u

0.34 V

(V)

(k J {m o l}^{- 1})

Z n^{2 +} | Z n

C u^{2 +} | C u

Z n | Z n^{2 +} (0.05 M) | | C u^{2 +} (0.005 M) | C u

\frac{R T}{F} = 0.059

Join BYJU'S Learning Program