किसी प्रक्रम की स्वतःप्रवर्तिता (spontaneity) की सबसे अच्छी माप है:

For a spontaneous process occurring at constant temperature and pressure, the changes in Gibbs free energy (ΔG) and entropy (ΔS) satisfy:

For a phase reaction A ⇌ B, the standard Gibbs free energy change is given by ΔG° = 105 - 35 log10 T (in J mol-1). Find the transition temperature (in °C) of the reaction at 1 bar pressure.