C - Plant Oils Flashcards
We can extract oils from…
Plants
Explain the process of extracted oil from a plant….
- Crushed
- Press the crushed plant material between metal plates to get the oil out
- Oil separated from plant material using a centrifuge or solvents
- Distillation refines oil, removes water, solvents and impurities
Vegetable oil provide lots of _______,__________ for the body
Energy
Nutrients
What are the 3 benefits of using vegetable oils for cooking?
- They have higher boiling points that water
- Gives food flavour
- Increases the energy we get from eating it
Surprisingly, vegetable oils can be used to produce _____ for transport
Fuel
Name the particularity useful fuel that is made from vegetable oils?
Biodiesel
Why can vegetable oils be good for running a car?
Because they provide lots of energy
Unsaturated oils/fats are…
C=C DOUBLE BONDS between their carbon atoms. They are LIQUID at room temperature e.g vegetable oil
Saturated oils/fats are…
SINGLE BONDS between their carbon atoms. They are SOLID at room temperature e.g lard
Unsaturated oils can be _______ to make them harder so they can be used for spreads e.t.c This happens at ___•c
Hydrogenated at 60°c
Name the 3 uses of plant oils..
- Food
- Cooking
- Produce fuels
Is it an unsaturated or a saturated oil that will decolourise bromine water?
Unsaturated
What are monosaturated fats?
Fats that contain ONE C=X double bond somewhere in their carbon chains
What are polyunsaturated fats?
Fats that contain more than one C=C double bond
What do u need to do to unsaturated oils to make them hard?
Hydrogenate them
