A closed, nonconducting, horizontal cylinder is fitted with a nonconducting, friction-less. floating piston which divides the cylinder into Sections A and B. The two sections contain equal masses of air, initially at the same conditions. T₁ = 300 K and P₁ = 1 atm. An electrical heating element in Section A is activated, and the air temperatures slowly increase: in Section A because of heat transfer, and in Section B because of adiabatic compression by the slowly moving piston. Treat air as an ideal gas with = 7/2 R, and let be the number of moles of air in Section A. For the process as described, evaluate one of the following sets of quantities: 1. , , and , if P(final) = 1.25 atm. 2. , , and P(final), if = 425 K. 3. , , and P(final), if = 325 K. 4. , , and P(final), if = 3 kJ mol⁻¹.