• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To compare the efficiency of different alcohols as fuel sources

Extracts from this document...


Tom Stathers 11law At1 Chemistry: Using alcohols as fuel sources Aim To compare the efficiency of different alcohols as fuel sources Background knowledge Alcohols are a closely related group of molecules that can be used as fuel sources, for example spirit burners to provide light and heat. One of the alcohols to be tested is ethanol, which is made from fermented sugar. All alcohols belong to a chemical family the general formula is CH + OH When any fuel burns it releases heat energy into the surroundings. (exothermic reaction as it releases heat energy). When Alcohol Burns it releases Co2 and H20. To make fuel burn you need to supply it with heat. The heat breaks up the molecules into atoms. When the Fuel is burnt the atoms join together to make new bonds. I will be testing ethanol, methanol, butanol and propanol to see which is the most efficient. To do this I need to find out how much energy has been burnt in the reaction. I will work out the heat of combustion as shown below. The example I have worked out is butanol. ...read more.


(2min) This is a list of the things I will keep the same: * The alcohol in the spirit burner e.g. methanol, Ethanol, butanol, propanol) * The amount of alcohol is specific to each burner used Apparatus * Clamp * Copper Beaker * Clamp stand * Boss * Spirit burner x4 * Heat proof mat * 100cm3 measuring cylinder * Water * Stop clock * Weighing scales * Thermometer * Bunsen burner * Splint Diagram Method 1. Set up equipment like in the diagram 2. Measure 100cm3 of water in the measuring cylinder and pour it into the copper calorimeter 3. Record the temperature of the water 4. Choose a spirit burner; make a note of the alcohol inside and the mass with the lid on. Light the spirit burner and place under it under the copper beaker 5. Stir the water gently all the way through the experiment with the thermometer 6. After 2 minutes record the temperature of the water and the mass of the spirit burner with the lid and fuel (Note the timing is incorporated into my experiment because I lost my results and I could only get one from another science group. ...read more.


Ways of improving my experiment * To make me results more accurate I could use more accurate equipment and make sure only the variables alter only (alcohols and water). * Keeping the distances exactly the same between the burner and the copper beaker. I could have use a sort of shield around the spirit burner and the copper beaker, which would have kept the heat from the burner directly concentrated on the copper baker giving a much more accurate reading. * I could have tested more alcohols and different structure types e.g. (butanol isomer 2 and propanol structure 2) this would have given me a chance to see if any other alcohols are better or worse than the ones I have tested * I also could have tried altering the water levels this might have produced different results. I could also have investigated other factors that affect the heat of combustion such as length of the wick. These factor could all be written into or improved on in experiments to come NOTE : The timing is incorporated into my experiment because I lost my results and I could only get one from another science group. Who used timing in their experiment) ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Organic Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Organic Chemistry essays

  1. Marked by a teacher

    What an ester is, how it is made, examples of esters, animal testing issues ...

    4 star(s)

    believe that cosmetics are essential in their daily lives. Also, 2 people are not sure. 2. Do you read the ingredients of a cosmetic before you buy it? The graph above shows that 7 people (the majority) out of 10 don't read the ingredients of a cosmetic before they buy it and only 1 person reads the ingredients.


    amount of water and how much the alcohol raises the water temperature must be controlled. FAIRTEST A fair test can only occur when I keep all the variables the same to ensure that the following must be kept in consideration.

  1. Investigating the Combustion of Alcohols

    This was not expected, so I had to weigh it on another set of scales, which provided me with a different recording. Due to this, other readings may have been manipulated and not very reliable.

  2. Comparing the enthalpy changes of combustion of different alcohols.

    hexanol, heptanol, octanol and decanol to give further evidence that there is a perfect relationship between the number of carbon atoms and the enthalpy change of combustion. I would need to find a way of introducing an 'oxygen feed' into the experiment so that there will be enough oxygen for

  1. Which Alcohol is the best fuel?

    Apparatus list The equipment I need to perform this experiment is: * A clamp - to hold up the tin can * A tin can - to store the water in * Measuring cylinder - to measure the amount of water accurately * Thermometer - to measure the temperature *

  2. The Energy Content Of Different Fuels

    of moles = mass Molar mass No. of moles = 0.8 / 74 = 0.01081081 moles of fuel used 4. Energy used & produced to = mass of water X S.H.C X Temp rise heat the water Energy = 25 X 4.2 X 70 = 7350 joules 5.

  1. Investigation to compare quantitatively the concentration of reducing sugars in samples of fresh orange, ...

    escaping, each time somebody else opens and closes the lid, which affects other people's results. Concentration of glucose Fair test By using a Burette - provides more accuracy Volume of Benedict's Fair test By using a Burette - provides more accuracy Method: * First of all, I made up a

  2. GCSE Chemistry Revision Notes - everything!

    The number of electrons in the outer energy level is the same as the group number (except for elements in group 0 which have 8 electrons, apart from helium which has 2 electrons). Characteristics of metals Almost all metals have certain properties in common: 1.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work