Chemisty Investigatory Project

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Compare rate of evaporation of different liquids

Text of 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