We desire t. o separate a feed of 75 mole % ethanol and 25 mole % propanol that is a saturated vapor at 556 moles/hr. distillate composition should be 99 mole % ethanol and bottoms 10 mole % ethanol. a partial reboiler and a total condens. er are used. reflux is a saturated liquid, and constant molal overflow can be assumed. the system has a constant relative volatility of 2.1, and ethanol is more volatile. boilup ratio v /b is 2.0. we desire to find the liquid composition leaving the second stage above the reboiler. note that the reboiler acts as an equilibrium contact. solve this problem both analytically and graphically.

maybe the spark is gone, love is a weird emotion and there is a possibility he may have found somebody else.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

it is the most commonly accepted one