G = H ñ TS is the equation that describes Gibbs free energy. Rearranged, the equation can be written as H = G + TS. In either case, G stands for the , H stands for the , and S stands for the . A) usable energy available to the cell; free energy; unusable energy B) usable energy available to the cell; total energy; unusable energy C) total energy; free energy; usable energy available to the cell D) total energy; usable energy available to the cell; unusable energyhe cell; unusable energy