Engineering, 13.09.2019 22:30 davidb1113
Fermentation of starch and sugar crops yields 5% to 20% molar volume of ethanol in water, which is too wet to burn. distillation of this mixture to remove water produces a mixture of 95% ethanol and 5% water, the azeotrope of the mixture, which is called hydrous ethanol. detydration to anhydrous ethanol, which is 99.7% pure ethanol and is the standard for blending with gasoline in the u. s., requires additional processing and costs. in brazil most vehicles are flex fuel vehicles of a different design that flex fuel vehicles in the u. s., in that they can burn straight hydrous ethanol (no gasoline) as well as any mixtures of gasoline and hydrous ethanol 1a) calculate the enthalpy change when oxidizing (burning) pure ethanol in air if the initial temperature is at 25c and the exhaust temperatures is 6ook. 1b) recalculate the enthalpy change for a hydrous ethanol mixture of 95% ethanol and 5% water. assume the 95: 5 mixture of ethanol and water is on a mass basis.
Answers: 3
Engineering, 04.07.2019 18:10, meganwintergirl
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
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Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
Fermentation of starch and sugar crops yields 5% to 20% molar volume of ethanol in water, which is t...
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