20g of ice are at thermal equilibrium with 200g of water in a thermally isolated vessel. a 60g block of aluminum at 250 c is dropped into the water-ice solution. lf=333 kj/kg for water, specific heat of water=4.2 kj/(kg k) specific heat of aluminum 0.9 kj/(kg. k) a)-what is the final temperature at thermal equilibrium? b)-what is the entropy change of the 20g of ice?

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers