fractional distillation

Question 1

more efficient method for separation and purification of a mixture

Answer 1

fractional distillation

Question 2

different type fractioning method

Answer 2

hempel column, Vigreux column and spiral wire column

Question 3

type of column that most commonly used in laboratory.

Answer 3

hempel column

Question 4

type of column that the glass tube does not contain pack

Answer 4

vigreux column

Question 5

column that composed of sharp indentation

Question 6

column that composed of sharp indentation

Answer 6

vigreux column

Question 6

type of column that composed of vertical glass tube contains pack that filled with glass or porcelain beads, chunk of glass tubing, glass helices

Answer 6

hempel column

Question 7

type of column that wire is inert to most materials ansd serves as good container

Answer 7

spiral wire column

Question 8

what type of column that is efficient in exhange between column and surroundings

Answer 8

spiral wire column

Question 9

serves as condensation which vapor can take place

Answer 9

packing material/ indentation

Question 10

why does fractional distillation is more efficient?

Answer 10

involves the use of fractioning column, repeated vaporation and condensation, better separation of components and temperature control.

Question 11

what is the role of packing inside the fractioning column?

Answer 11

serves to increase the surface are for vapor and to promote separation of components repeatedly condensation and vaporization

Question 12

when is the fractional distillation method applicable?

Answer 12

when components have different boiling points, commonly used in similar boiling points such as refining oil into different components

Question 13

boiling point of gasoline

Answer 13

20-200

Question 14

boiling point of kerosene

Answer 14

180-260

Question 15

boiling point of diesel

Answer 15

260-340

Question 16

boiling point of fuel oil

Answer 16

370-600

Question 17

number of atoms found in gasoline

Answer 17

5-10

Question 18

number of atoms found in kerosene

Answer 18

10-16

Question 19

number of atoms found in diesel

Answer 19

14-20

Question 20

number of atoms found in fuel oil

Answer 20

20-70

Question 21

how can you u say that each fraction is a mixture based on the table used as fuels?

Answer 21

since has a variety of boiling points and caron atoms.

Question 22

how does the carbon atoms in a molecules affect boiling points?

Answer 22

as the number increase the boiling points also increases due to larger and more complex molecules having stronger intermolecular forces.

Question 23

compare the observed boiling point of ethanol with the value from literature. Give possible reason of significance difference.

Answer 23

vary slightly from literature since the value of each ethanol based on literature is 78. The reasons for this is due to different factors such as variation of atmospheric pressure, impurities of sample and differ in heating rate.