C1 Plant Oils 0.0 / 5 ? ChemistryPaints and oilsGCSEAQA Created by: jadedavisonweirCreated on: 25-03-16 14:39 3 organic things containing oil plants fruits and seeds 1 of 23 why is oil extracted from these things used in food, used for fuel 2 of 23 3 ways oil is extracted crushed and pressed, centrifuge, solvents 3 of 23 what is done to the oil once extracted + why distillation to refine it, removes water, solvents and impurities 4 of 23 what do vegetable oils provide lots of energy, vitamin E, fatty acids 5 of 23 how can you cook faster using oil they have higher boiling points than water so can cook the food at higher temperatures so takes less time 6 of 23 what do oils do to the flavour flavour is soluble in oil so the oil carries the flavour making it seem more intense 7 of 23 what can be done with vegetable oils (not food wise) turned into fuel 8 of 23 what makes them suitable for this they provide a lot of energy 9 of 23 what fuel is the oil made into biodiesel 10 of 23 pro to biodiesel burns in the same way as ordinary diesel fuel so you can use it to fuel a diesel engine 11 of 23 whats the difference between monosaturated fats and polysaturated fats mono: contain one double carbon bond in their chain poly: contain more than one double carbon bond in their chain 12 of 23 why do you want to harden oils because theyre liquid at room temperature 13 of 23 how do you harden oils reacting the oil with hydrogen in the presence of a nickel catalyst at about 60 degrees Celsius 14 of 23 what is the process of hardening oils called hydrogenation 15 of 23 why do they harden in this process the hydrogen reacts with the double bonded carbons and opens out the double bonds 16 of 23 what does hydrogenation do to the properties have higher melting points, more solid at room temperature 17 of 23 why are partially hydrogenated veg oils used instead of butter in processed foods much cheaper and they keep longer which gives them a long shelf life 18 of 23 why are they considered bad end up with trans-fats and there is evidence suggesting that they are very bad for you 19 of 23 why are saturated fats bad increases blood cholesterol level, cholesterol increases risk of heart disease 20 of 23 why are unsaturated fats good reduce amount of blood cholesterol 21 of 23 why are trans-fats bad increases cholesterol 22 of 23 why is cooking with either oils bad makes it more fattening 23 of 23
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