Athousand kilos of soya beans, of composition 18% oil, 35% protein, 10.5% moisture and 36.5% other contents of carbohydrate ,fiber and ash are sent to a crusher, where it is crushed and pressed this reduces oil content in the beans to 6%, this extra amount of oil leaves the crusher; the oil-reduced beans then enter an extractor where hexane is added which in turn produces soya beans containing 0.5% oil; and finally the beans are sent to a dryer to leave with 8% moisture. assuming that there is no loss of protein and water with the oil, set out a mass balance for the soyabean constituents.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

answerspecific gravity;