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

An Investigation into How the Amount of Heat Produced By Burninga Fuel Depends On the Mass of the Fuel Burnt

Extracts from this document...

Introduction

An Investigation into How the Amount of Heat Produced By Burning a Fuel Depends On the Mass of the Fuel Burnt Aim My aim is to measure the energy released when burning ethanol. Introduction Exothermic reactions release energy in the form of heat. A rise in the temperature indicates an exothermic reaction. The energy that is given out due to the breaking of bonds forms new bonds, therefore an exothermic reaction occurs. When breaking old bonds the energy is not as great as it is when bonds are forming. Endothermic reactions continuously need heat to be put in so they can form the necessary chemical bonds. In an endothermic reaction the products tend to be of more use then the reactants. A fall in the temperature indicates an endothermic reaction. The breaking of bonds is an endothermic reaction, this is when the existing bonds are supplied with energy to break them. When forming new bonds the energy is not as great as it is when bonds are broken. Scientific Knowledge The following equation was the one used to calculate the amount of energy released by the ethanol: C2H5OH ==> 2CO2 + 3H2O Bond Energies: C - C 347kJ/mol C - H 413kJ/mol O - H 464kJ/mol C - O 360kJ/mol C = C 612kJ/mol H - H 436kJ/mol C = O ...read more.

Middle

Variables Independent Variables: I will only change the mass of ethanol I use, increasing it each time. Dependent Variables: I shall be measuring the temperature and change in mass during this experiment. Fixed Variables: Throughout the experiment I will make sure the volume of the water remains the same, the fuel I use will always be ethanol, the height will always be 7cm from the base of the clamp, the crucible I use weighs the same as the first one I used or that it is the same one and that I use the exact same can. Ensuring I Carry out a Fair Test * Repeat the experiment and work out and average. * Use the same crucible each time as some might be thicker then others, which can cause a change in conductivity and results. * Use the same can each time. * Make sure the height from the bottom of the can to the base of the clamp is always the same for if it isn't it could effect the results. * Always ensure you are using the same amount of water each time. Apparatus * Clamp * Safety Mat * Soft Drink can (eg. Coke, Sprite, etc.) * Measuring Cylinder * Water * Thermometer * Crucible * Ethanol * Pipette * Splint * Tongs * Digital Balance Labelled Diagram Risk Assessment * Make sure you wear goggles at all times for protection. ...read more.

Conclusion

Results Table 1: Amount Of Ethanol (g) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Mass Of Crucible & Fuel Before Burning (g) 15.67 16.17 16.69 17.17 17.67 18.17 18.67 19.17 Mass Of Crucible & Fuel After Burning (g) 15.17 15.19 15.17 15.17 15.17 15.17 15.17 15.17 Mass Of Fuel Burnt (g) 0.5 0.98 1.52 2.0 2.5 3.0 3.5 4.0 Volume Of Water In The Can (ml) 250 250 250 250 250 250 250 250 Temperature Of Water Before Burning (�C) 22 21 22 22 22 22 23 23 Temperature Of Water After Burning (�C) 26 27 39 44 52 54 59 62 Rise In Temperature Of The Water (�C) 4 6 17 22 30 32 36 39 Table 2: Amount Of Ethanol (g) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Mass Of Crucible & Fuel Before Burning (g) 15.67 16.17 16.67 17.17 17.70 18.19 18.67 19.17 Mass Of Crucible & Fuel After Burning (g) 15.17 15.17 15.17 15.20 15.19 15.17 15.17 15.17 Mass Of Fuel Burnt (g) 0.5 1.0 1.5 1.97 2.51 3.02 3.5 4.0 Volume Of Water In The Can (ml) 250 250 250 250 250 250 250 250 Temperature Of Water Before Burning (�C) 22 22 22 22 22 22 22 24 Temperature Of Water After Burning (�C) 27 29 37 44 51 56 59 65 Rise In Temperature Of The Water (�C) 5 7 15 22 29 34 37 41 Firuze Naim 11P 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 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

    The aim is to investigate if there is a link between the number of ...

    3 star(s)

    � Alcohols - this is used as the fuels for the experiment � Foil - this is used to stop heat escaping for the fuels so that the water heats up more quickly. � Balances - this is used to weight the fuels before and after each experiment.

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

    6.1 Net Present Value NPV theory states that in order to increase shareholder wealth, the project with the highest NPV should be adopted. This is inline with Sainsbury's corporate strategy. Both NPV's are calculated on a five-year time scale, as shown in the table below: FUEL NPV Natural Gas 5,270,377.8

  1. Find out which fuel releases the most energy per gram.

    Apparatus: Stopwatch, five containers containing the five fuels we will be using (methanol, butanol, ethanol, propanol and hexane), thermometer, boiling tube, clamp and stand. Preliminary experiment discussion: We did three preliminary experiments to find out what is the most accurate method to do this experiment, and by more accurate I

  2. Alcohol investigation

    However, I also think the actual values will be less than the theoretical values, as in the experiment, energy will be lost into the atmosphere, transferred to the atoms in the copper beaker, causing heat energy, etc. The products of the reactions will be carbon dioxide and water as well

  1. Hydrogen as an alternative fuel

    of hydrogen has the same amount of energy as 2.1 kg of natural gas or 2.8 kg of gasoline. Hydrogen burns in air at concentrations in the range of 4 to 75 percent by volume (methane burns at 5.3 to 15 percent concentrations by volume).

  2. What factors affect the amount of energy given out when an alcohol is burnt?

    Output Variables: The output variables in this experiment are the following: Temperature of water: The heat given off by the flame from the burning alcohol affects the temperature of the water. The flame heats the water through the glass of the beaker.

  1. Which Alcohol is the best fuel?

    Also at three minutes, the hot water could be dangerous and I want to ensure safety. I decided to use 5cm as a height above the wick because 11 and 8cm were quite high above the wick and the heat wasn't really reaching the bottom of the tin can and was being transferred to the surroundings.

  2. GCSE Chemistry Revision Notes - everything!

    Chlorine can remove electrons from bromide or iodide ions, and bromine can remove electrons from iodide ions. Chlorine is a strong oxidising agent because its atoms readily attract an extra electron to make chloride ions. Bromine is less successful at attracting electrons, and iodine less successful still.

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