chemisty investigatory project

5/21/2018 Chemisty Investigatory Project

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CHEMISTRY

INVESTIGATORY

PROJECTCompare Rate OFEvaporation Of Different

Liquids.

In this project three different liquids are

taken and the are studied on the basisof their rate of evaporation by

performing an experiment to determine

the same.

2014

-15

By Keertana Madan

XIIA


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2CertificateThis is to certify that Keertana Madan of

Class XII-A and roll no _______ has

completed this project under my guidance

and supervision.

Mrs. Prarthna ChatterjeeChemistry Teacher

Summer Fields School


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3Acknowledgements

I feel immense pleasure in presenting this project Report. I

am grateful to my Chemistry Teacher Mrs. Prarthna

Chatterjee who inspired me and helped me in presenting this

project report. Her guidance and support proved to be of

immense aide for the completion of this project.

I would also like to express my gratitude towards the lab-

assistant Mr._____________ without whose

assistance the experiments would not have been successfully

completed.

Lastly I would like to thank my parents for their patience

and support that has helped me a lot.

A huge Thank You to all of you.


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4

Aim:

To compare the rate of

evaporation of different liquids.


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5Apparatus :1). Pipette

2). Test Tubes (3)

3) . Petri dishes (3)

4). Watch Glasses

5). Graduated cylinder


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6List of Contents1. Introduction.

2. Materials Required.

3. Theory.

4. Procedure.

5. Observations.6. Results


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7Introduction:It is a matter of common experience that a liquid

placed in an open vessel disappears gradually. It is

because all liquids on heating changes into vapor

and this process of change of liquid into vapor is

termed as evaporation.

We know that the molecules of a liquid are held

closely by attraction and their attractive forces areconstant in motion. However at any given instant

not all the molecules have some kinetic energy

ranging to very low to very high value. As a result of

this the highly energetic friction of the molecules at

the surface could overcome the intermolecular

attractive forces and escape from the surface.Evaporation is accompanied by cooling. This is due

to the escape of more energetic molecules as

vapor resulting in decrease of average kinetic

energy of the remaining molecules.


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8Materials Required:1. Water.

2. Petrol.

3. Methyl alcohol.


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9TheoryThe three liquids used for this experiment are:

Petrol, Methyl Alcohol and Water. A few words

about them are given below:-

PETROL

It is produced from petroleum. Petroleum is a dark

viscous oily liquid which occurs at various depths

below the surface of earth. It is also called rock oil

and is often associated with large neutral gases

which are removed, then the remaining liquid is

called crude oil. Petroleum in modern civilization is

also known as liquid gold. The refining of the

crude oil is done in refineries. Thus, it is possible to

separate the crude oil into a number of useful

products. Petrol is produced at 343-393 K from

petroleum. Its approx composition is C7-C9. It has

making petrol gas for dry-cleaning. It is called

gasoline.


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10METHYL ALCOHOL-The hydroxy derivative of methane is termed as

methyl alcohol. As there is only one hydroxy grouppresent in the formula of methyl alcohol i.e.

CH3OH, so it is monohydric alcohol. These days

methanol is prepared in a synthetic method by

passing the mixture of CO & H2Oover a heated

catalyst (Cr2O3OH)at 723 K. It has a pleasant smell

but a burning taste and is lighter than water. Itsboiling point is very low.

WATER-

Out of all chemical substances around us, water is

the most important. It covers nearly 3/4thof earths

surface. It is very essential for the growth of human

body, which consists of 75% of water. It is clear,transparent liquid without any smell, color and

taste. It freezes at 227K & boils at 373K. Water is

regarded as a universal solvent because most of

the inorganic solutions are soluble in it. Chemically,

water is quite stable and is neutral towards the

litmus.


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11Procedure :1). Take three pipettes. After cleaning and

drying them, measure 10 ml of distilled water

with one pipette and pour it into petril.

Similarly with pipettes, take 10 ml of petrol and

methanol.

2). Place all the three petri dishes with liquids

into the fume cup-board and start the stopwatch.

3). After exactly 45 minutes carry out the

liquids and measure the graduated cylinder.

4). Find the volume of V1-V2; where V1 is the

volume of liquid taken and V2 is the volume ofliquid remained after 45 minutes.


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12OBSERVATION Table:S.no Names of the

liquids

V1

Initial Volume

V2

Final Volume

Time

(Minutes)

1 Petrol 10 7.5 45

2 Methanol 10 8 45

3 Water 10 9 45


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13Results:The rate of evaporation of the

three liquids taken i.e. petrol,

methyl, water is in the following

order :

1). Petrol.2). Methyl Alcohol.

3). Water.


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THANK

YOU

chemisty investigatory project

Documents

project report

remaining molecules

molecules atthe surface

liquid gold

energetic molecules

darkviscous oily liquid

different liquids aretaken

surface of earth