A 100 kmol/h stream that is 97 mole% carbon tetrachloride (CCl4) and 3% carbon disulfide (CS2) is to be recovered from the bottom of a distillation column. The feed to the column is 16 mole% CS2 and 84% CCl4 , and 2% of the CCl4 entering the column is contained in the overhead stream leaving the top of the column

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg