Aliquid feed of 100kg mol/hr of benzene-toluene at the boiling point contains 55 mol% benzene and 45 mol% toluene. benzene is the more volatile component of the two. it is being distilled at 101.32kpa to give a distillate of composition 98mol% benzene and a residue product which is lean at 10mol%. using a reflux ratio of 2.0 do the following. a) determine top and bottom product flow rates b) determine the number of theoretical trays required c) calculate the condenser heat load d) calculate the reboiler heat load e) state how you would determine the minimum number of theoretical trays required

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation