Problem
1. Ammonia (2 kg) in a piston/cylinder is at 100 kPa, -20oC and is now heated in a polytropic process with n = 1.3 to a pressure of 200 kPa. Do not use the ideal gas approximation and find T2, the work, and the heat transfer in the process.
2. A small, flexible bag contains 0.1 kg of ammonia at -10oC and 300 kPa. The bag material is such that the pressure inside varies linearly with the volume. The bag is left in the sun with an incident radiation of 75 W, losing energy with an average 25 W to the ambient ground and air. After a while the bag is heated to 30oC, at which time the pressure is 1000 kPa. Find the work and heat transfer in the process and the elapsed time.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.