Aliquid stream consists of 14.5 mol% isopentane (c5h12 or ip), and the balance is a heavy hydrocarbon (hhc). the stream is fed at 1400 mol/hr to the top of a stripping column. the stripping column operates at 40°c and 2.1 atm. the liquid stream is contacted with an upward-flowing gas stream, which enters the column as pure nitrogen (n2). the residual liquid leaves the bottom of the column containing all of the hhc and 4% of the ip entering the column. the exiting gas is in equilibrium with the entering liquid. calculate the mole fractions of the gas stream exiting the column and the total molar flow rates (mol/hr) of streams entering or exiting the stripping column. assume the pressure of the mixture is maintained at 540 mmhg.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).