Engineering, 12.03.2020 23:59 anonymous9723
For a mixture of methanol (1) and methyl acetate (2): a.) Assume the mixture is found to obey Raoult’s law. At 60ºC and x1 = 0.25, what is the system pressure and the composition in the vapor? b.) Assume the mixture is found to obey Raoult’s law. At 60ºC and 90 kPa, what are the compositions in each phase? c.) Assume the mixture is NOT an ideal solution, and instead follows Modified Raoult’s law. It has been found experimentally that: ln(%) = 1.25x- - and ln(-) = 1.25x% -. At 100ºC and x1 = 0.75, what is the system pressure and the composition in the vapor?
Answers: 1
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
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Engineering, 04.07.2019 18:10
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Engineering, 04.07.2019 18:20
Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg
Answers: 2
Engineering, 06.07.2019 02:30
Air (c-1.006 kj/kg.k, r-0.287 kj/kg.k) enters a nozzle steadily at 280 kpa and 77°c with a velocity of 50 m/s and exits at 85 kpa and 320 m/s. the heat losses from the nozzle to the surrounding medium at 20°c are estimated to be 3.2 kj/kg. determine (a) the exit temperature and (b) the total entropy change for this process. solve this problem using constant specific heats.
Answers: 1
For a mixture of methanol (1) and methyl acetate (2): a.) Assume the mixture is found to obey Raoult...
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