(a) Calculate $Δ_{r} G^{0}$ for the reaction $M g (s) + {C u}^{2 +} (a q) \to {M g}^{2 +} (a q) + C u (s)$ .
Given: $E_{c e l l}^{0} = 2.71 V, 1 F = 96500 C {m o l}^{- 1}$
(b) Name the type of cell that was used in Apollo space program for providing electrical power.

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Solution

(a) For the cell reaction,
$M g (s) + C u_{2} + (a q) \to M g_{2} + (a q) + C u (s)$ ; $E^{o} c e l l = + 2 \cdot 71 V$
The change in the standard Gibbs free energy is given as:
$Δ r G^{o} = - n F E^{o} c e l l = - 2 \times 96500 \times 2.71 = - 523030 J m o l^{- 1}$
b) The fuel cell which uses the reaction of hydrogen with oxygen to form water was used in Apollo space programme for providing electrical power.

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△_{r} G^{0}

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M g (s) + C u^{2 +} (a q) \to M g^{2 +} (a q) + C u (s)

Given:

E_{c e l l}^{0} = + 2.71 V, 1 F = 96500 C m o l^{- 1}

(b) Name the type of cell which was used in Apollo space programme for providing electrical power.

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(a) Calculate ΔrG0 for the reaction Mg(s)+Cu2+(aq)→Mg2+(aq)+Cu(s).Given: E0cell=2.71V,1F=96500Cmol−1(b) Name the type of cell that was used in Apollo space program for providing electrical power.

(a) Calculate $Δ_{r} G^{0}$ for the reaction $M g (s) + {C u}^{2 +} (a q) \to {M g}^{2 +} (a q) + C u (s)$ .
Given: $E_{c e l l}^{0} = 2.71 V, 1 F = 96500 C {m o l}^{- 1}$
(b) Name the type of cell that was used in Apollo space program for providing electrical power.