Other slides in this set

Slide 2

Preview of page 2

Here's a taster:

What are fossil fuels
The sun passed solar energy to the plants,
and plants were eaten by animals. When the
plants and animals died and started decaying,
some of them got buried deep under the
ground for many million years, where they
turned into fossil fuels like coal, gas and crude
oil.…read more

Slide 3

Preview of page 3

Here's a taster:

How do we extract
crude oil ?
We extract crude oil , by
using Fractional Distillation .
Crude oil can be used to
Diesel , Plastics , Paint ,
Medicine and cosmetics…read more

Slide 4

Preview of page 4

Here's a taster:

What is fractional distillation ?
Fractional distillation is the separation of a
mixture into its component parts, or fractions,
such as in separating chemical compounds by
their boiling point by heating them to a
temperature at which several fractions of the
compound will evaporate. It is a special type of
distillation.…read more

Slide 5

Preview of page 5

Here's a taster:

Fractional Distillation Of Crude
In order to separate the different length chains
in the crude mix, it is heated to a very high
temperature. The temperature is set so that
all those fractions with a Carbon chain length
of 20 and below are evaporated from the
crude mix. The temperature cannot be set
higher than this as there is a risk that the
lighter fractions will ignite.
The remaining liquid, which is composed of only
the heavier fractions, passes to a second
location where it is heated to a similar
temperature, but at lower pressure. This has
the effect of making the heavy Hydrocarbon
fractions more likely to evaporate…read more

Slide 6

Preview of page 6

Here's a taster:

What are the different
fractions ?
These different length chains are called fractions .
The smaller the chain the easier it evaporates .
Efect of Intermolecular forces on melting and
boiling points of molecular covalent substances-
Since melting or boiling result from a progressive
weakening of the attractive forces between the
covalent molecules, the stronger the
intermolecular force is, the more energy is
required to melt the solid or boil the liquid.…read more


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »