§76 Reversible cell 7.6.3 Reversibility of electrochemical cell (1)Relationship between chemical energy Thermodynamic reversibility and electric energy dG=-SdT+vdp+sw 1. Reversible reaction The electrode At constant temperature and pressure reaction reverts when shift from charge △G=W to discharge Reversible process: conversion of chemical reversible electrode energy to electric energy in a thermo dynamic reversible manner or vice versa. 2. Reversible pre △G=W"'=gv=-mFE 1→0, no current flows. Maximum useful work The relation bridges thermodynamics and electrochemistryMaximum useful work (1) Relationship between chemical energy and electric energy At constant temperature and pressure Reversible process: conversion of chemical energy to electric energy in a thermo￾dynamic reversible manner or vice versa. The relation bridges thermodynamics and electrochemistry §7.6 Reversible cell 7.6.3 Reversibility of electrochemical cell 1. Reversible reaction: The electrode reaction reverts when shift from charge to discharge. reversible electrode 2. Reversible process: I → 0, no current flows. Thermodynamic reversibility §7.6 Reversible cell d d d ' G S T V p W = − + +  = G W '  = = − G W QV nFE  ' =