• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12

Whether alcohol is suitable alternative for petrol, and Whether it matters which alcohol we use.

Extracts from this document...

Introduction

Introduction Today, the prices of vital commodities derived from oil are increasing, and in particular, the cost of running a petrol driven car is becoming more expensive to do so, and this is all due to the fact that the amount of oil left to be extracted is diminishing. Thus, a suitable alternative is required. One such candidate is gasohol, which is about % alcohol. This is much cleaner than normal petrol, and also makes the petrol last a lot longer. Thus, my objectives, and the purpose of this piece of coursework is to find out: 1) whether alcohol is suitable alternative for petrol, and 2) Whether it matters which alcohol we use. Preparation In order to complete either objective ("whether alcohol is a suitable alternative for petrol?" And; "Does it matter which alcohol we use?"), I need to make sure that I carry out a fair test, which means that I keep all the variables the same except one, which will be the alcohol. I will also need to repeat the experiment 3 times in order to check the accuracy of the experiment. The variables are: 1) the distance the calorimeter is above the flame 2) the amount of water used 3) ...read more.

Middle

However, in practice, a proportion of this energy will be lost to the surroundings. In order to verify these theoretical results, I need to make some actual measurements. My experiment is set out in the method. Prediction I predict that as the size of the alcohol molecule increases, so will the amount of energy per mole released. I also predict that ethanol will not release as much energy per mole than petrol. Method Apparatus list: Measuring cylinder Copper calorimeter Crucible & glass wool wick [spirit burner] Heat proof mat Clamp & stand Goggles Alcohols - ethanol, propanol and butanol. I will set up the apparatus as shown, using the above equipment. From my preparation experiments, I know that to achieve the best results, I need to use 50cc's [50ml or 50g] of water, and set the calorimeter at 10cm above the top of the spirit burner, which used a 3.5cm high wick. Before I start the experiment, I will need to weigh the spirit burner with alcohol, so that after I have heated the water 10�C, I can weigh it again, and find the mass of alcohol burnt. I can then put this information into the formula: Mass of water x ? ...read more.

Conclusion

But, these molecules require more energy to get them started. There is also a trend in the balanced formulas for the complete combustion of the alcohols. C2H5OH + 3O2 � 2CO2 + 3H2O C3H7OH + 4.5O2 � 3CO2 + 4H2O C4H9OH + 6O2 � 4CO2 + 5H2O With each extra carbon atom in alcohol molecule, there are two extra hydrogen atoms, and 1.5 extra oxygen molecules are needed to completely combust the alcohol. An extra carbon dioxide and an extra water molecule are also produced. This can be turned into a mathematical formula, thus: CnH2n+1OH + 1.5nO2 � nCO2 + n+1H2O This sort of formula is called an homologous series. Alcohols are a homologous series, and other such series include alkanes, and alkenes. What could I do to make this experiment better? To make this experiment work better, and achieve a higher efficiency, I could do several things. First, I could conduct the experiment inside a sealed container, as this would stop air heated by the combustion of the alcohol escaping. The container could also be silvered (this would stop heat being radiated away), as well as being filled with oxygen, which would ensure that as much of the alcohol was oxidised as possible. I could also use a much cleaner copper calorimeter, as this would ensure a good transfer of energy to the water. Peter Hill 11z GCSE Chemistry Coursework 1 ...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 Electricity and Magnetism 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 Electricity and Magnetism essays

  1. Marked by a teacher

    Investigation into Energy Released From Burning Various Alcohols.

    4 star(s)

    I will also let the flame on the burner burn for 30 seconds before placing it beneath the beaker of water. This will allow it to stabilize, and the alcohol will be burning at a constant rate. When I measure the mass of the spirit burner, I will measure it with the cap on.

  2. To investigate which fuel gives out the most energy when burnt. We are burning ...

    I first filled a copper can with 100cm3 of water using a measuring cylinder. I then clamped this 12cm above a spirit burner filled with ethanol. I then weighed the spirit burner, and recorded the temperature of the water before the burner is lit.

  1. Burning Alcohol

    I will do three replicates and take an average to make sure my results are accurate. Controlled Variables Each experiment, I will keep the same: * The mass of water (100g) * The tin can * The distance between the wick of the alcohol bottle and the tin can (20mm)

  2. To find out what happens to the efficiency of a motor as I change ...

    It is important to note that it is friction between the spindle and the string, not the efficiency of the motor that is responsible for a decrease in useful energy output in this instance. Though the graph makes it appear that the motor's efficiency is decreased, the actual rotational kinetic

  1. Finding a material's specific heat capacity

    450 27.1 11.8 4926 242 4684 480 27.0 11.9 4926 363 4564 510 26.9 11.9 4926 363 4564 540 26.8 11.9 4926 363 4564 570 26.8 11.9 4926 363 4564 600 26.6 11.9 4926 363 4564 630 26.5 12.0 4926 484 4443 660 26.4 12.0 4926 484 4443 690 26.3

  2. Investigation to see the relationship between actual and theoretical energy released when burning different ...

    I did this by balancing the equations and using the amount of energy needed to break each bond. I then added the bond energies for the bonds broken together, to get a total amount of energy needed to break the bonds in the reactants.

  1. Factors Affecting the Efficiency of a Wind Turbine

    The only variable in this investigation is blade length. Everything else will be constant. Cutting blades of different lengths will increase the length. Blades will be attached to three different wooden corks according to their lengths. How these blades will be made and cut has already been explained and it will be done exactly the same way.

  2. Comparing the Energy Released By combustion of Different Alcohols

    This allowed for the flame to burn freely without the bottom of the calorimeter interfering with the combustion and making it unfair. * How large should the flame be? Although the size of the flame will not effct the results diretly because the rate at which the alcohol burns is

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