Consider an electrochemical cell: A s A n+ aq, 2 M B 2n+ aq, 1 M B s . The value of ΔH o for the cell reaction is twice that of ΔG o at 300 K . If the emf of the cell is zero, the magnitude of Δ S o in J − 1 K − 1 mol − 1 of the cell reaction per mole of B formed at 300   K is ____ (Given: R =   8 .3   JK − 1 mol − 1 . H,   S and G are enthalpy, ent

Step-by-step solution

A(s)   |   A +n (aq .   2   M)   ||   B +2n (aq .   1   M)   |   B(s) ΔH o   =   2ΔG o     E cell   =   0 Cell   Reaction        A → A +n + ne −   ×   2 B +2n + 2   ne − → B(s) 2   A(s) + B +2n 1   M (aq) → 2   A +n 2   M (aq) + B(s) ΔG   =   ΔG o   +   RT