Under isothermal conditions, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given: 1 L bar = 100 J]

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.