Comment whether the following transformations are diffusionless and diffusional (if diffusional, mention what type of diffusion - short or long range). describe each transformation in brief. (2.5 x 4 = 10) a)-martensitic transformation b)- polymorphic transformation c)-pearlitic transformation d)-spinodal decomposition

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.