• 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)

    that each fuel did not combust to a certain extent, as there may have been a slight lack of oxygen required for it to combust correctly. Although these figures are below what would have been expected, they still show the same trend pattern that the theoretical values dictate, as further explained by the graph below.

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

    put the thermometer into the cold water and leave for a few minutes. Record it's initial temperature. Write this into the appropriate column of the table. * Support the calorimeter making sure that the calorimeter is straight and not leaning to one side and place underneath a spirit burner containing

  1. To Investigate the Combustion of Fuels

    needed to form the bonds on the right half of the equation. To do this, we must know the bond energy values of all the bonds. They are: C=O = 740 KJ mol-1 O-H = 460 KJ mol-1 Then we add up the bond energy values of every bond that

  2. Investigate the enthalpy change of different alcohol

    Record the maximum temperature so that a drop in temperature caused by leaving the calorimeter too long would not mislead us to the inaccurate reading. 4. Close the cap to the burner when not used, because short-chain alcohol is very volatile.

  1. Hydrocarbons As Fuels.

    Physical properties of Alkanes Since the electronegativities of carbon and hydrogen are 2.5 and 2.1 respectively have only weak dipole moments. C----H bonds Weak attractive forces exist between dipoles in neighbouring molecules, and van der Waals forces also come into the play.

  2. Measuring the Enthalpy Change of Combustion of Different Fuels

    Use the thermometer to stir the water in the aluminium can. 11. Continue to stir the water until the thermometer reads 40� C. 12. Once the water reaches 40� C, place the spirit burner cap on top of the spirit burner, which will extinguish the flame.

  1. Energy Transfer in Fuels

    As the initial and final temperature is the same so is the temperature change. So the formula will be the same for each fuel. = This shows us how much energy was transferred to the water by using temperature change as the factor.

  2. GCSE Chemistry Revision Notes - everything!

    The magnesium atoms lose electrons to form magnesium ions. Mg (s) ? Mg2+ (s) + 2e- Those electrons have been gained by the copper (II) ions to make the atoms present in the metallic copper. Cu2+(s)+ 2e- ? Cu(s) Oxidation is thus defined as the loss of electrons and reduction as the gain of electrons.

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