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Problem 11.9: Assuming the system methanol(1)/ethanol(2) to form ideal solutions, do the following: a) Calculate the bubble and dew pressure at 100 °C of a mixture that contains 20% methanol by mol. b) Construct a Pxy graph at 100 °C. c) Construct a Txy graph at 1.2 bar. d) A stream that contains a methanol/ethanol mixture with 32% mol methanol is flashed to 100 °C to a pressure such that the molar rate of the vapor stream is 75% of the feed. Determine the temperature and the composition of the two phases. The Antoine equation for the pure components are given below:
An evaporator is used to concentrate 20 wt % NaOH solution entering at 150°F to a 45 wt% NaOH solution exiting at 200°F. What is the pressure in the vapor space of the evaporator
The horsepower output from the prime mover to drive the generator at this load.
Consider an ordinary, helium-filled party balloon with a volume of 2.2ft3 . The lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon.
Determine the efficiency when the transformer delivers a load of 2 kVA at 0.85 power factor lagging.
Commercial cold packs and hot packs are available for treating athletic injuries. Both types contain a pouch of water and a dry chemical. When the pack is struck, the pouch of water breaks, dissolving the chemical, and the solution becomes either ..
Produce a hypothetical set of performance specifications for such a signaling device.
Suppose that both diodes have Rf = 10 Ω and Von = 0.5 V. Find the revised values of the resistors and voltage sources (v1 and v2) in order to accomplish the same objective.
Calculate the concentrations of the stock solution and solutions A, B, and C.
Using an average value of 2.4 for the volatility of benzene relative to toluene, calculate the number of theoretical plates required at total reflux. Also calculate the minimum reflux ratio, if the feed is liquid and at its boiling point.
Why fluids are important in chemical engineering - enormous number of materials normally exist as gases or liquids, or can be transformed into such phase and explain systematic description of change in fluid systems, mechanical change
If a saturated solution of NaHCO3 at 60°C is cooled and comes to equilibrium at 30°C, what percentage of the dissolved salt crystallizes?
Also find the source voltage that would yield I = -8µA.
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