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Consider an electrochemical cell : A(s...

Consider an electrochemical cell :
`A(s)|A^(n+) (aq. 2M)||B^(2n+) (aq. 1M)|B(s)`. The value of `DeltaH^(@)` for the cell reaction is twice that of `DeltaG^(@)` at 300 K. If the amf of the cell is zero, the `DeltaS^(@) ("in "JK^(-1) mol^(-1))` of the cell reaction per mole of B formed at 300 K is ______ .
(Given : In (2) = 0.7, R (universal gas constant) = 8.3 J `K^(-1) mol^(-1)`. H, S and G are enthalpy, entropy and Gibbs energy, respectively.)

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