a cylinder contain 10kg of a certain fluid at an initial pressure of 40bar the fluid is allowed to expand reversible behind a piston according to a law pv^2= constant until the volume is doubled. the fluid is then cooled reversibly at constant pressure until the piston regains it original position heat is then supplied reversible with the piston firmly locked in position until the pressure rises to the original value at 40bar. calculate the network done by the fluid for an initial volume of 0.05m^3​

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w