• 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

Extracts from this document...

Introduction

Comparing the enthalpy changes of combustion of different alcohol's PLANNING Apparatus The apparatus I will use during this experiment will be: - Heat Proof mat - Clamp - Retort Stand - Copper can - Measuring cylinder - Thermometer - Alcohol's (Methanol, Ethanol and Propanol) - Water - Bunsen Burner - Safety glasses - Access to balance - Draught Shield Quantities of materials required The only Quantity that I know I will use will be the 50ml of water. Method The Diagram below shows the apparatus set up for burning a liquid fuel. ...read more.

Middle

Continue heating until the temperature has risen by 15oC - 20oC. Do not let the thermometer touch the bottom of the copper can as this is the hottest part of the can and so the experiment would be unfair. - Extinguish the burner and immediately weigh the fuel burner to note the mass of fuel burned - Keep stirring the water and note the highest temperature reached. - Subtract the starting spirit burner weight from the second to retrieve the amount of fuel burned within the experiment. - Clean the copper can of any carbon on the outside with water and a cloth. ...read more.

Conclusion

may easily catch fire - Vapors may cause headaches and dizziness and can irritate the eyes and skin - Wear eye protection - The room should be well ventilated The plan I have devised is likely to provide precise and reliable results as I have carried out the experiment myself and written down a step by step procedure of what I did when I carried out the experiment myself. The points are easy and clear to understand, so that any student would be able to follow them. The sources I have used to devise my plan are: - Hazard cards - Chemical ideas - Salters advanced chemistry - Worksheet DF1.2 ...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. Comparing the enthalpy changes of combustion of different alcohols.

    * Carry all substances with care. * Remove loose clothing (e.g. tie). * Do not inhale or drink any of the fuels as they are harmful. * Do not eat or drink during the experiment. * If any substance is dropped on the floor contact the lab technician immediately.

  2. Investigate the enthalpy change of different alcohol

    Rise in temperature (c) Weight of the spirit burner (g) Mass of fuel used (g) 46 / 213.47 / 53 7 213.08 0.39 58 5 212.8 0.28 Fuel Energy transferred to water by burning fuel (J) cyclohexanol 200 x 21 x 4.2=17640 J 200 x 8 x 4.2=6720J Propane 200

  1. Esters. Esters are formed from an alcohol and carboxylic acid; this is an ...

    Another person said. 'So I do not agree with testing on animals, but you just have to test the chemicals somewhere. If it was possible just to do it with other chemicals, than of course that would be the ideal solution.

  2. Comparing the Enthalpy Changes of Combustion of Different Alcohols

    compound the more negative the ?Hc value becomes (more energy is released to the surroundings when the alcohol is combusted) this means that the larger the molecule, the more energy is released, as more bonds are broken. There is also a regular increase in ?Hc of approximately 650 kJmol-1 for each extra -CH2 unit.

  1. Comparing the enthalpy changes of different alcohols

    Results Fuel Initial temperature of the water �C Final temperature of the water �C Temperature rise of the water �C Mass of H2O (g) Initial Mass of spirit burner (g) Final Mass of the spirit burner (g) Mass of fuel burnt (g)

  2. Comparing the enthalpy changes of combustion of different alcohols

    Carry out this procedure twice for each alcohol, allowing averages to be taken from the results ensuring accuracy. When carrying out the procedure for the next alcohol tip away water and start again. Be sure to keep the volume of water and the rise in temperature the same for each alcohol.

  1. Comparing the enthalpy changes of combustion ofdifferent alcohols.

    - 2C -3C - H | | | OH H H Propan-2-ol H H H | | | H - 1C - 2C - 3C - H | | | H OH H Butan-1-ol H H H H | | | | H - 1C - 2C - 3C -

  2. GCSE Chemistry Revision Notes - everything!

    The alkali or carbonate (usually in aqueous solution) is placed in a wide necked flask with the added indicator. Acid is added from the burette until the end point is reached, identified by a sudden change in colour. The indicator is removed by boiling the solution with charcoal.

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