Problem 1: Free energy changes: isothermal expansion The ideal gas pictured initially occupies a volume of 1 L in a container in contact with l a thermal bath maintained at a temperature of 300 K. The gas is allowed to expand by reducing its initial pressure of 2 atm slowly (to allow the gas to maintain its temperature) until it reaches a nal pressure of 1 atm. A. Determine the change AU of internal energy of the gas. Explain. Thermal bath: T=300 K B. Determine the change AH in enthalpy of the gas during the process. (Hint: this will not equal the amount of heat exchanged by the gas since the pressure is not constant in this process) C. Determine the changes ASenergy, ASvola AS in the energetic, volumetric, and total entropy respectively. D. Determine the changes AF and AG in Helmholtz and Gibbs free energy during the process