A feed containing equimolar amounts of methanol and water is mixed with 10 moles of a 40 % mol aqueous methanol stream. The mixture enters a first separation unit that creates two streams. A top stream exits the separation unit that contains 70 % mol methanol and rest water. The bottom stream, which is 70 moles enters a second separation unit. A top stream exists the second separation unit as a 50 % methanol & 50 % water mixture. The other stream is unknown. If the fresh feed to the system is 100 moles (equimolar mixture) and the two top streams exiting the separation units have the same flow, draw the flow sheet and find the molar flow and the composition of the bottom streams existing the second separation unit?

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explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

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