An insulated cylinder covered by a frictionless piston is separated into two parts by a rigid diathermal partition as shown in Figure P5.45. Originally both parts contain air in thermodynamic...

An insulated cylinder covered by a frictionless piston is separated into two parts by a rigid diathermal partition as shown in Figure P5.45. Originally both parts contain air in thermodynamic equilibrium at T = 30°C and p = 200 kPa. Now a weight is placed on the piston resulting in a total external equivalent pressure of 1.5 MPa, which pushes the piston down. After some time the temperatures in the two parts equalize. a. Find the temperature in the upper part right after the piston moves down. b. Find the temperature in the cylinder after the two parts come to mutual equilibrium.