Ammonia is absorbed from air stream using water at 0 °c and 1.30 atm. the entering water stream is pure water. the entering vapor is 18 mol% ammonia. the goal is to recover 82% of the ammonia in the water outlet stream. the inlet gas flow rate is 50 kmol/hr. absorbent flow rate is 1.5 times the minimum solvent rate. equilibrium data are given below. assume dalton’s law applies. 1st column ‘g nh3/1g h2o’: 0.05 | 0.075 | 0.100 | 0.15 | 0.20 | 0.25 | 0.30 | 0.40 | 0.50 | 0.60 |‘partial pressure of nh3, mmhg’: 11.2 | 17.7 | 25.1 | 42.7 | 64 | 89.5 | 119 | 190 | 275 | 380

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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explanation: