Chemistry, 24.09.2019 18:30 sciencecreation87
Evaporation is to be used to concentrate 3000 kg/h of a 10% solution of naoh in water entering at 70°c to a product of 45% solids. a single effect evaporator requires 2595 kg/hr of steam, resulting in a steam economy of 0.9. saturated steam at 198.53 kpa (120°c) is to be used. a triple-effect evaporator is used to reduce the amount of steam, and the overall heat-transfer coefficient is 1500 w/(m2⋅k) in each evaporator. calculate the temperature (boiling point of the liquid) in each evaporator, the steam required (kg/h), the steam economy (kg water vaporized per kg steam used), and the heating surface area (m2) for each evaporator. assume the pressure in the third evaporator is a maximum of 5 kpa.
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Chemistry, 22.06.2019 04:30
The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.
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Chemistry, 22.06.2019 17:00
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.
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Evaporation is to be used to concentrate 3000 kg/h of a 10% solution of naoh in water entering at 70...
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