A piston cylinder contains 3 kg of air at 20°C and 300 kPa. It is now heated up in a constant pressure process to 600 K. a) Find the final volume b) Plot the process path in a P-v diagram c) Find the work in the process.

A constant-pressure piston/cylinder assembly con- tains 0.2 kg of water as saturated vapor at 400 kPa. It is now cooled so that the water occupies half of the original volume. Find the work and heat trans- fer for the process.

A block of 3 kg, initially at rest, is pushed uphill on an incline of 30 degrees over a distance d,. The pushing force is directed horizontally and has a constant magnitude of 35 N. The surface of the incline offers a constant kinetic friction (µk = 0.3). a) Make a FBD for the block and use Newton's 2nd law to find the normal force and the friction. b) Use work-energy approach to calculate how much farther the block moves uphill after we stop pushing (this distance (d,) should be expressed as a proper or improper fraction of the "pushing distance"(d,) – I am not asking for a number!!). Take as your SYSTEM: BALL+INCLINE+EARTH. Make sure to make lists of all the forces that are relevant and to calculate the work done by each of them, as seen in the lectures.

Got ans 184.7 kPa ,Is it right? Show complete work.

3.56 Refrigerant-12 in a piston/cylinder arrangement is initially at 50° C, x = 1. It is then expanded in a process so that P = Cv to a pressure of 100 kPa. Find the final temperature and specific volume.

An ideal gas initially occupying 0.020 m3 at 1.0 MPa is quasistatically expanded inside a piston-cylinder device at a constant pressure until its volume doubles. Next the expansion is continued at constant volume till the pressure reaches half of the initial pressure. Finally it is brought back to the initial state in a polytropic process with exponent n=1.6 a) Draw the processes on a P-v diagram and calculate the total work. b) Calculate the total heat transfered, what is the difference between the initial and final temperature?