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

To Find Out Which Fuel Gives Out the Most Energy.

Extracts from this document...

Introduction

Fuels Investigation Aim: To find out which fuel gives out the most energy. Planning We will be using 6 different fuels to heat up 100ml of water, and find out the changes of the temperature. We will measure the temperatures of the water before and after the experiment. We will burn heat the water for exactly 2 minutes, and check the changes in temperature. The change in temperature will allow us to work out the energy given off the fuel by using this formula: Mass of water x 4.2 (water's specific heat capacity) x temperature change = energy transferred from the fuel to the water When the fuels are burnt, energy is given off. I will be calculating the energy given off using the formula above. The specific heat capacity is the energy needed (Joules) to heat 1 gram of water by one degrees Celsius. Preliminary Experiment To help me decide the vital elements of the experiment, I made a trial run using methanol to check if my chosen quantities and set up would work. Results: Height of can from burner: 5cm Mass of burner at start = 204.47g. ...read more.

Middle

When alcohols combust with oxygen/air, they produce heat, So my prediction is that Methanol is going to give off the least energy, and as the bonding gets bigger, the more energy is given off, so Hexanol would give off the most energy. Here are the chemical formulas and the balanced equations: Methanol - CH3OH + 3O2 Ethanol - C2H5OH Propanol - C3H7OH Butanol - C4H9OH Pentanol - C5H11OH Hexanol - C6H13OH The energy given off per mole can be worked out theoretically with the energy per mole for each bonding. Types of bonding Energy in bond (kilojoules per mole) C - C 348 KJ C - H 412 KJ C - O 360 KJ C = O 805 KJ O - H 463 KJ O = O 498 KJ The balance equations and theoretical energy given off: - Methanol 2CH3OH + 3O2 ? 2CO2 + 4H2O 6 x C-H (412) + 2 x C-O (360) + 3 x O-H (463) + 3 x O=O (498) ? 4 x C=O (805) + 8 x H-O (463) = 5612 - 6924 = -1312KJ/Mole Ethanol C2H5OH + 3O2 ? ...read more.

Conclusion

Rise in temperature of water (�C) Energy released per gram of fuel (j) 1st 0.52 24 19385 2nd 0.49 16 13714 3rd 0.47 14 12511 4th - - - Average 0.49 27 15203 Pentanol Mass of fuel burnt (g) Rise in temperature of water (�C) Energy released per gram of fuel (j) 1st 0.31 9 12194 2nd 0.37 9 10216 3rd 0.34 9 11118 4th - - - Average 0.34 9 11176 Hexanol Mass of fuel burnt (g) Rise in temperature of water (�C) Energy released per gram of fuel (j) 1st 0.31 9 12194 2nd 0.43 13 12698 3rd 0.36 12 14000 4th - - - Average 0.37 11.3 12964 Energy Per Mole I am going to use the average energy per gram to work out the energy per mole. Methanol - Formula mass: 32 5811J/gram x 32 = 185952J/mole = 185.95KJ/mole Ethanol - Formula mass: 46 10812J/gram x 46 = 497352J/mole = 497.35KJ/mole Propanol - Formula mass: 60 13864J/gram x 60 = 831840J/mole = 831.84KJ/mole Butanol - Formula mass: 74 15203J/gram x 74 = 1125022J/mole = 1125KJ/mole Pentanol - Formula mass: 88 11176J/gram x 88 = 983488J/mole = 983.5KJ/mole Hexanol - Formula mass: 102 12964J/gram x 102 = 1322328J/mole = 1322.3KJ/mole ...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. Find out which fuel releases the most energy per gram.

    mean to get a number that we feel is the closest number we will get to the theoretical values. The first time we agreed that 3 minutes of heating would be enough keeping in mind that if we heat the water for too long, a lot of energy would be lost.

  2. THE LINK BETWEEN CARBON ATOMS IN A FUEL AND THE ENERGY IT RELEASES.

    * Although the windows were kept shut, I couldn't stop people from moving around the laboratory so their movements create the artificial wind in the class. Heat is also lost through this wind. * In higher temperatures, heat is lost faster.

  1. To find out which of these four alcohols: ethanol butanol propanol pentanol is the ...

    Get a spirit burner weigh it using a balance, record the results in the table. 3) Fill the conical flask with 100ml of water and place a thermometer in it and place it into the grips of the clamp and tighten it so it is fastened securely and just above the wick of the spirit burner.

  2. The Energy Content Of Different Fuels

    I have decided that it does not matter how long the experiment takes and therefore I do not need to time my experiment. The temperature difference between the beginning of the experiment and the end will be reflected in how long it took to increase the difference in mass that

  1. The aim of this investigation is to compare the enthalpy of the following different ...

    water to form ethanol, which is an important solvent * It combines with benzene to make the chemical needed for the manufacture of the plastic, polystyrene * It reacts with chlorine to form the intermediate used to make the plastic, pvc * Its molecules can be polymerized to make polythene.

  2. This is a mini-project on fuel - topics include petrol and fossil fuels.

    live in quarters on the platform * A platform may stand on legs and be as tall as a skyscraper. Some platforms do not have legs but rest on huge floats called pontoons * PIPELINE Along pipe carries oil from the platform to an oil terminal or tanker port.

  1. "Could Sainsbury's add value to their business by using an alternative fuel for their ...

    Fleet running costs, including maintenance, depreciation, taxes and other expenses amount to �12 million a year. Sainsbury's are in partnership with BP Oil, which ensures that they are consistently provided with diesel for their fleet and enjoy lower costs due to the bulk-purchasing economies and partnership arrangements.

  2. GCSE Chemistry Revision Notes - everything!

    ? Cu2+ (a) + 2e- At the cathode, Cu2+ ions are deposited as copper. Cu2+ (aq) + 2e- ? Cu(s) The impure copper at the anode gradually disappears, and pure copper is plated on the cathode. The impurities collect in the anode mud.

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