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

To find a pattern in the heat of combustion of number of fuels.

Extracts from this document...

Introduction

Heats of Combustion of Alcohol Mark Wong 11N Aim: To find a pattern in the heat of combustion of number of fuels. Apparatus: * Clamp Stand * Copper Can * Thermometer * 6 different alcohols - methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol and hexan-1-ol * Matches * Heat proof mat * Aluminum foil * Rubber band * 100ml of water - for each alcohol * Measuring cylinder * Measuring scale Diagram: Method: 1. Collect and set up equipment as shown in diagram 2. Collect the first alcohol on the list (methanol) 3. Measure water to 100ml and pour into copper can 4. Measure temperature of water and record on a table 5. Measure whole weight of the alcohol excluding the cap of the bottle of alcohol and record the weight 6. Light the alcohol with a match and stir the water inside repeatedly 7. Stop experiment after the temperature has increased by 300c 8. Reweigh the mass of the alcohol and record 9. Repeat the test 3 times for a fair and meaningful result 10.Repeat the experiment with all the other alcohols Variables/Fair Test: In order to obtain a fair test the following will be done 1. ...read more.

Middle

0C Weight of alcohol before (g) Weight of alcohol after (g) Difference in mass (g) Methanol 25 55 189.84 185.52 -4.32 Ethanol 25 55 242.5 239.08 -3.42 Propan-1-ol 27 57 240.49 238.28 -2.21 Brutan-1-ol 27 57 263.32 261.19 -2.13 Pentan-1-ol 27 57 211.07 209.01 -2.06 Hexan-1-ol 28 58 241.57 239.43 -2.14 Average from the 3 tests Alcohol Average mass change (g) Methanol 3.55 Ethanol 2.84 Propan-1-ol 2.15 Brutan-1-ol 2.20 Pentan-1-ol 2.00 Hexan-1-ol 1.59 Calculations: Mass of water being heated - 100cm3 = 100g Specific heat capacity of water - 4.18 J0c -1g1 Change in temperature of water - 300c The following formulas were used to calculate the Energy change in water and the No. Of joules one gram of fuel produces Amount of energy (J) given out by fuel = Q = mcT Where: Q= energy change in Joules M=mass of water being heated in grams C=specific heat capacity of water T=change in temperature in 0c Energy change in water = _J = 100 x 4.18 x _0C No. Of joules one gram of fuel produces = _J/_g = _J/g Table of Energy change in water and No. ...read more.

Conclusion

I have also followed the instructions of producing a fair test. The main problem of this experiment was he conditions we did the experiment in. There was a slight lack of time for the experiments to be done; the experiments could be repeated more in order to obtain an even more accurate result and better evidence would be shown if the experiment were to be repeated. The room temperature should be fixed; this is because the room temperature also affects the measurements on the thermometer therefore a fixed temperature (either air conditioning to be powered on or off). Also if I had more time, I would calculate the number of Joules that one mole of fuel would produce. In that way I can compare the experimental results (Joules/grams) with the theoretical results (Joules/moles). If I had more time I would do research on this experiment before I start planning and proceed to this experiment, this way I would have more background knowledge of the experiment and will not suffer as much without knowing the theory of this experiment. A hypothesis can then be done if research and further knowledge of this experiment existed before, which then means a prediction can be made and compared to theory. ...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 Aqueous 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 Aqueous Chemistry essays

  1. How much Iron (II) in 100 grams of Spinach Oleracea?

    Wash the beaker and glass rod twice using a small volume of Sulphuric Acid (aq) to collect up any remaining Iron (II). 7) Wash the residue in the funnel once with a little Sulphuric Acid (aq) and collect the filtrate.

  2. Investigate how the amount of heat produced by burning a fuel depends on the ...

    * Pour out a certain amount of tap water into the tin can, using a measuring cylinder (the exact amount of water, too, is yet to be determined, as I shall be investigating what the optimum amount of water to use is, in my preliminary experiment).

  1. Specific Heat Capacity

    As the results to this experiment are so far out and it is difficult to minimise the error, as it is very difficult to find adequate insulation, I needed to find a more suitable method to find the specific heat capacities.

  2. Indigestion - find out the composition of tablets which are for indigestion and compare ...

    You have been told the level of phosphate in your blood is low (hypophosphataemia). You have heart or kidney problems. You are in the first 3 months of pregnancy. Rennie Peppermint Keep out of the reach of children. Tums Antacid Keep out of the reach of children.

  1. We are investigating which alcohol is the most effective for producing heat and energy. ...

    If the alcohol ion the burner were at different heights then it would take different amounts of time for the alcohol to reach the top of the wick. The water would take longer to heat depending on the volume of water.

  2. The aim of this experiment is to find the enthalpy change of combustion of ...

    * Next 100cm3 should be carefully measured out with the use of the measuring cylinder. * This water should then be carefully poured into the calorimeter, (no water should be present before hand and if the calorimeter has been previously used it should be dried with a cloth as it could affect the results).

  1. To find the investigate the chemistry of propan-1-ol

    Gently distil 2-3 cm3 of liquid into a test tube. 11. Perform the following test on the product: a. The smell of the product b. Adds an appreciable volume of sodium carbonate solution c. Add a few drops of the product to 2 cm3 of Benedict's solution and 1 cm3 dilute sodium hydroxide, then boil gently.

  2. Heat transfer - We travelled to the McDonalds in Notting Hill Gate hoping to ...

    I will only fill the can up to 330ml, mainly so it doesn't overflow and then it would be hard to seal it. Metal cans are very good conductors of heat so they will lose heat immediately. Please keep in mind that I have already tested the thicknesses of the polystyrene, which I did not mention.

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