- Problem 4 Consider A Frictionless Piston Cylinder Assembly Filled With Air And Housing A Pure Copper Ball The Crossse 1 (145.64 KiB) Viewed 46 times
Problem #4: Consider a frictionless piston/cylinder assembly filled with air and housing a pure copper ball. The crosssectional area and mass of the piston are 0.1 square meters and 30.6 kg, respectively. Gravity acts toward the bottom of the page at 9.8 m/s2, such that the weight of the piston influences the pressure of the air inside the piston/cylinder. The surrounding pressure is 100kPa. Take the air and copper ball as a combined system in thermodynamic equilibrium at the initial state and final state. The mass of the copper ball is 20 kg. the initial temperature of the system is 300 K. the initial volume of the air is 0.251 m3. The final temperature of the system is 500 K. Determine the following: a. The initial pressure of the air. b. The boundary work c. The heat d. What are the assumptions necessary to answer the first three questions?