(c) Air is made up of a mixture of gases, and is comprised of only 21% oxygen. The remaining gases would not be involved in the combustion process. On the contrary, the gases such as carbon dioxide may hinder the combustion process. Hence, if the bomb calorimeter were to be pressurised with air at 30 atm, it would result in an incomplete combustion of the fuel sample due to the lesser quantities of oxygen available. There would be a slower rate of combustion which leads to inefficient burning and less heat would be produced in the process.
In this method no distillation column is used. On the other hand, fractional distillation is useful in separating a complex mixture of miscible liquids, such as ethanol and water, into their components in accordance with their boiling points. The fractional
What substances do we have in the rb flask when heating is turned off? Do we need to add more substances in the fact table? Ethanol, Ethnoic acid, Sulphuric acid and some ester, no because the sulphuric acid is a catalyst and is not consumed or does not react. In this practical we use our knowledge about “Le Chatelier’s principle” to increase the yield. What do we do, in terms of Le Chatelier’s principle to increase the yield?
Heat generated from the fusion process dissipates almost immediately upon hitting the substrate, preventing any heat transfer to adjacent areas or scorching of areas of below surface. Metal fusion wraps around angles and stiffeners similar to electrostatic paints applications. Due to the instant curing, the coating does not shrink like paint products, which contain solvents and does not pull away from sharp edges. This process can be completed in a matter of minutes depending on the scope of the
Since a single effect evaporator has a very poor steam economy , a three effect multiple evaporator system is used. The design of a the system requires rigourous planning and precision to optimise the steam economy/heat loads in order to achieve maximum possible efficiency in a stream lined fashion. The feed that is fed into the evaporator system undergoes several pre -treatment processes in order to remove the hardness and other impurities which can hamper the system. In the penultimate stage it is treated in a Reverse Osmosis plant , the discharge of which is fed into the Multiple Evaporator System. The feed mainly consists of sodium chloride and sodium sulphate along with traces of other impurites.
The highly saline water passes through the inlet. One of the outlet gives desalinated water while, the other one gives concentrated brine. In idea conditions, this technique requires 2.5 to 7 kj energy to produce 1 kg of fresh water. But, practically it requires more energy. The minimum energy required to remove the salinity of water is independent of technology because it’s a thermodynamic process.
When working dimethylglyoxamine, carefull attention has to be taken when adding the chemical because both an excess amount and insufficient amount of the organic compound will have an adverse effect. An excess amount of dimethylglyoxamine will ultimately dissolve nickel dimethylglyoxamine which would result in low percent recovery for nickel. An insufficient amount of dimethylglyoxamine, however, will cause some of the reagent to precipitate giving as a result a positive error in the percentage of nickel recovered. Materials and Methods To begin the experiment, three medium-porosity sintered-glass crucibles were brought to a constant mass by heating them for an hour at a constant 110 degrees Celcius. The initial
Pure trimyristin can easily be isolated by recrystallization with ethanol. Soaps are alkali metal salts of aliphatic fatty acids having from ten to eighteen carbon atoms. The hydrocarbon chain is oil-soluble, while the carboxylate anion end is water-soluble. The number of carbon atoms is extremely important for the utilization of soap. If there are less than ten carbon atoms, it will not cause the oils to emulsify, and if there are more than eighteen carbon atoms, the salt will not be water-soluble and will not form a colloidal dispersion.
Antioxidants provide an alternate path for oxidation which does not involve the substrate, e.g. fats and oils. The antioxidant does not function indefinitely; it is destroyed in the process. Peroxide value is one of the most important criteria used to monitor the oxidation process. In the course of oxidation, the peroxide value first increases very slowly (the induction period).