A liquid mixture contains 40% by weight of a compound A; 20% weight of a compound B and the remaining of a compound C and D. A stream of this mixture is fed to a unit of separation. By the current obtained through the upper part of the unit, a mixture is obtained containing 70% of compound C, 20% of compound D and no compound B. The current The lower part contains 80% of compound B, and the remainder of compounds A, C and D. The design of the column requires the top flow rate to be twice that of the bottom. Can the system be resolved? Justify your answer.

If you know pure nitrogen gas has a pressure of 1 atm, how many intensive degrees of freedom does your system have? choose the correct one. 1) 1 , 2) 0 , 3) 3,  4) 2

Q1: A rotary countercurrent dryer is fed with ammonium nitrate containing 5% moisture at the rate of 1.5 kg/s, and discharges the nitrate with 0.2% moisture. The air enters at 405 K and leaves at 355 K; the humidity of the entering air being 0.007 kg moisture/kg dry air. The nitrate enters at 294 K and leaves at 339 K. Neglecting radiation losses, calculate the mass of dry air passing through the dryer and the humidity of the air leaving the dryer. Latent heat of water at 294 K = 2450 kJ/kg. Specific heat capacity of ammonium nitrate = 1.88 kJ/kg K. Specific heat capacity of dry air = 0.99 kJ/kg K. Specific heat capacity of water vapor = 2.01 kJ/kg K.

1. Why does a glass of soda fizz more when poured over ice rather than into an empty cold glass? Be detailed and scientific using terms learned in this course.