Flashcards
Sem título
Flashcards do conjunto (14)
- 1What properties are there of materials?-Melting/Boiling point
-Density - mass per unit volume
-Flexibility/ stiffness - permenantly damage?
-Hardness - difficulty to cut into
-Strength -resisting force - 2Name two materials that are natural-Cotton
-Wool - 3Name 3 synthetic materials-Nylon
-Polyester
-Rubber - 4Name two raw materials-Aluminium
-Iron - 5What do you need to think about when choosing how a product is made?-Its job and its properties
- 6What do a products properties depend on?-The materials it is made from
- 7What is crude oil?A mixture of hydrocarbons with different chain lengths
- 8What two types of bonds are there in crude oil and its hydrocarbons?-Strong covalent/ intramolecular forces
-Weaker intermolecular forces - 9What happens when enough energy is supplied to the crude oil mixture?-It can overcome the intermolecular forces and move about on its own, as a gas
- 10What are some uses of crude oil?-Petrol
-Plane fuel
-Chemicals used in roads
-Plastics - 11What is fractional distillation?-When different hydrocarbons are separated due to their chain length.
The oil is heated at different temperatures as the chain lengths mean that the hydrocarbons would boil at different temperatures, making is able to be separated into different fractions - 12What is polymerisation?-When lots of monomers are chemically joined up to create a long chain called a polymer
- 13What happens during polymerisation?-When the conditions are right, for example, in high temperatures, the monomers would "join hands" and make a long chain
- 14—
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- FlashCards sobre Sem título, criado por Sparkle Shine em 04-04-2016.
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- Sparkle Shine
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