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

Comparing the enthalpy changes of combustion of different alcohol's and fuels.

Extracts from this document...

Introduction

Comparing the Enthalpy Changes of Combustion of Different Alcohol's and fuels Plan Introduction In this experiment I will attempt to find out the energy needed to raise the temperature of 1g of water by 1oC using different fuels and alcohol's. This will enable us to determine the change in enthalpy for the different substances. Method * Firstly I will measure 200cm3 of water out into a copper coulometer * Then I will half fill a spirit burner with the required fuel, the burner must have a lid to stop ...read more.

Middle

recorded and the wick of the burner ignited * After securing the draft excluder with heat proof gloves and leaving a small gap at the bottom for air to get in I will stir the water to insure that the temperature rise is equal throughout the 200cm3 of water. * Just before a suitable temperature rise e.g. 20oc the flame will be extinguished with the burner cap to immediately stop the consumption of fuel. ...read more.

Conclusion

The large bottles containing the fuel for distribution will be kept as far away from the experiment as possible preferably in a fume cupboard preventing fumes from being ignited. Fair Test To make certain that the results are fair I will always use fresh cool water and leave time for the copper coulometer to cool to room temperature, try to keep wick lengths and distance between burner and coulometer regular. Will keep size and placement of the draft excluder the same throughout the experiment and keep all relevant apparatus the same. Results Hexane Using the data book I will calculated the expected Craig Davis 08/05/07 Fuels Investigation 1/2 ...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. Peer reviewed

    Burning Fuels Coursework

    4 star(s)

    This is why it is shown as an anomalous result on the graph. Further proof of this was black soot on the bottom of the test beakers. Methanol, being one of the cheapest fuels to buy, may contain certain impurities that the other more expensive fuels would not have in them.

  2. The Energy Content Of Different Fuels

    both times so that I can ignore the weight of the burner because it will not change. * Calculate the number of moles of fuel used. To do this I must use this equation: Mass = No. of Moles used Molar Mass I have before this had to calculate the molar mass of each alcohol used using the periodic table.

  1. To Investigate the Combustion of Fuels

    4 253.59 252.41 1.18 19 30 11 4620 3915.25 Average - - - - - - - 3636.07 Propanol: Reading Mass of Spirit Burner (g) Fuel Used (g) Temperature (oC) Temperature rise (oC) Total Energy Released (J) Energy Released per Gram burnt (J g-1)

  2. Hydrocarbons As Fuels.

    -Disadvantages: not large enough supply to replace fossil fuels at present rates of use. Methanol This simple alcohol can be made quite cheaply from methane. It is often used in racing cars. -Advantages: methanol burns cleanly and completely; little carbon monoxide is produced.

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

    I am keeping the variables that I do not wish to change as constant as I can; although some of these are hard to control e.g. amount of O2 present in the atmosphere. The plan that I have used will provide reliable results as I plan to repeat the experiment three times.

  2. Comparing the Enthalpy Changes of Combustion of Different Alcohols

    The calorimeter has an open top that allows heat to escape from the surface of the water. Apparatus Draught excluder Spirit burner Liquid fuel (butan-1-ol, ethanol, methanol, propan-1-ol, propan-2-ol) Retort stand, clamp, and boss Metal calorimeter (a metal cylinder such as a small tin makes a good conductor)

  1. Measuring the Enthalpy Change of Combustion of Different Fuels

    Leave the thermometer in the water until the temperature stops rising. Then when the temperature is stable, record the temperature. 14. Place the spirit burner on the balance with the cap and record the mass given in grams 15.

  2. GCSE Chemistry Revision Notes - everything!

    Many elements form compounds with sulphur. These are called sulphides. Many of the most important metal ores are sulphides, such as galena and lead sulphide. Sulphur exists in 3 main forms (2 crystalline forms and one plastic form). Rhombic sulphur is the form of sulphur that is stable at room temperature.

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