A sample which is having 2.50 moles of an ideal gas at 298K is expanded from an initial volume of 10.0L to a final volume of 50.0L. Determine delta G and delta A for this process for a) an isothermal reversible path and b) an isothermal expansion against a constant external pressure of 0.750 bars. Discuss why delta G and delta A do or do not differ from one another.