Discuss below:
Q: A balloon filled with 40 moles of He at 3 atm pressure and at room temperature (300 K) expands isothermally from a volume Vi to a volume Vf till its pressure falls to 1 atm.
(a) What are Vi and Vf?
(b) What is the work done during the expansion?
(c) What is ΔU?
(d) What is Q (heat exchanged) during the process?
(e) Calculate ΔS directly from the Sackur-Tetrode equation.