1.The stream from a gas well is a mixture containing 50 mol % methane, 10 mol % ethane, 20 mol % propane, and 20 mol % n-butane. This stream is fed into a partial conderser maintained at a pressure of 250 psia, where its temperature is brought to 80 degrees F. Determine the molar fraction of the gas that condenses and the compositions of the liquid and vapor phases leaving the condenser.
2.What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface? A factor of safety of 2 is to be maintained against bearing failure.