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    To Determine The Energy Content in The Sample of Food

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    nanarahmannaim
    The document outlines an experiment to determine the energy content of different foods by measuring temperature changes in water. Peanuts were found to have the highest energy value, increasing the water's temperature by 210°C, followed by biscuits at 120°C and white bread at 90°C. The experiment supports the hypothesis that peanuts have a higher energy value than bread or biscuits. The energy value provides useful information for planning diets according to daily energy needs.

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    To Determine The Energy Content in The Sample of Food

    Uploaded by

    nanarahmannaim
    1K views2 pages
    The document outlines an experiment to determine the energy content of different foods by measuring temperature changes in water. Peanuts were found to have the highest energy value, increasing the water's temperature by 210°C, followed by biscuits at 120°C and white bread at 90°C. The experiment supports the hypothesis that peanuts have a higher energy value than bread or biscuits. The energy value provides useful information for planning diets according to daily energy needs.

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    lab report

    Original Title

    To Determine the Energy Content in the Sample of Food

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    The document outlines an experiment to determine the energy content of different foods by measuring temperature changes in water. Peanuts were found to have the highest energy value, increasing the water's temperature by 210°C, followed by biscuits at 120°C and white bread at 90°C. The experiment supports the hypothesis that peanuts have a higher energy value than bread or biscuits. The energy value provides useful information for planning diets according to daily energy needs.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    1K views2 pages

    To Determine The Energy Content in The Sample of Food

    Uploaded by

    nanarahmannaim
    The document outlines an experiment to determine the energy content of different foods by measuring temperature changes in water. Peanuts were found to have the highest energy value, increasing the water's temperature by 210°C, followed by biscuits at 120°C and white bread at 90°C. The experiment supports the hypothesis that peanuts have a higher energy value than bread or biscuits. The energy value provides useful information for planning diets according to daily energy needs.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    TO DETERMINE THE ENERGY CONTENT IN THE SAMPLE OF FOOD

    Problem statement
    Which type of food has the highest energy value?

    Hypothesis
    The final temperature reading/energy value for peanut is higher than bread and biscuit

    Variables
    MV : type of food
    RV : the energy content
    CV : volume of distilled water

    Materials and apparatus


    biscuit,peanut,white bread,distilled water,boiling tubes,plasticine,pin,thermometer,bunsen burner and wire
    gauze,stopwatch,retort stand and clamp

    Procedure
    1. white bread weighed and its weight is recorded
    2. 20ml distilled water is poured into boiling tube
    3. The boiling tube is clamped to the retort stand
    4. Initial temperature of water in the boiling tube is recorded
    5. The white bread spiked firmly at the end of the pin which is mounted on some plasticine
    6. The white bread Ignite by holding it in the flame of a bunsen burner and immediately placed beneath the
    boiling tube to heat the water
    7. The water stirred gently with the thermometer
    8. The final temperature is recorded (highest temperature reached) as soon as the peanut has stopped burning
    using thermometer.
    9. The energy value of the peanut is calculated using the formula below

    Energy = Change in temperature X volume of water X Specific heat capacity of water


    Mass of food sample

    10. The results are recorded in table below


    11. Steps 1 to 9 are repeated by using different food sample such as peanut and biscuit.

    Observation

    Food sample Temperature 0C Mass of Energy


    Initial Final Increase in food value
    temperature sample
    White bread 330C 420C 90C 3.3 229
    Peanut 270C 480C 210C 1.5 1176
    Biscuit 300C 420C 120C 2.2 458

    Discussions:
    1. State three precautions needed when carrying out this experiment.
    Make sure that the nut is completely burnt before reading the temperature.
    Make sure that the nut is put as close as possible to the bottom of the boiling tube.
    Make sure that the water is stirred before reading the temperature.

    2. Does the mass of the nut effects energy value?


    No. Because the energy value is the amount of energy produced when 1g of food is completely oxidized.

    3. How can we apply the knowledge of the energy value in our daily lives?
    To plan our diets according to our daily needs.
    Conclusion:
    Hypothesis is accepted. Peanut has the highest increase in temperature/energy value.

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