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21 Cards in this Set

  • Front
  • Back

What is a melting point?

The point when a substance turns from solid to liquid

What is strength ( 2 types )

Ability to resist a force


tensile - ability to resist a pulling force


compressive - ability to resist a pushing force

What is stiffness?

Ability to bend easily

What is hardness?

How easy it is to cut the substance

What is density?

Mass per unit volume

What is crude oil?

A mixture of hydrocarbons of varying lengths

What is nanotechnology?

The making and the use of nanoparticles the size from 1-100 nanometer

How are nanoparticles used in sport equipment and in medical equipment?

Makes sports gear stronger/durable with no added weight



Silver nanoparticles have small surface area to volume ratio making them able to kill bacteria

Why are people sceptical of nanoparticle technology? What are the in place precautions?

The effects are not fully understood, especially long term ones.


Items with Nanoparticles in should be labelled

How do the varying lengths of crude oil affect it's properties? Why?

Short means it will have a lower boiling point and will be a gas. Not much energy to break the IMF



Long means it will have a higher boiling point and will be viscous. More energy required to break IMF

What happen when you heat crude oil?

The intermolecular forces can be broken, chain can 'wizz' off as a gas

In crude oil can covalent bonds be broken when heated?

No, the forces are too strong

How can crude oil be separated? What does it separate into?

Fractional distillation


Groups of different boiling points/lengths

What is crude oil mainly used for? Name some example of its products

Mainly fuels such as petrol and diesel, other products are like plastics, medicines, fertilisers, lubricating oil

What is a polymer? What are they usually based of?

Many monomers (small molecules) joined together. Usually carbon based

How are polymers created?

Under high pressure

What is affected by how close polymers are put together?

Density

How can you change the properties of a polymer? [4]

• Cross links


• Crystalline/branched structure


• Chain length


• Plasticisers

What is nanotechnology?

1-100 nanometers


Natural - salt particles


Artificial - sport equipment, socks, medical equipment

What is nanotechnology?

1-100 nanometers


Natural - salt particles


Artificial - sport equipment, socks, medical equipment

Why is the population dubious of nanoparticle technology?

Effects not yet known, must be labelled