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

Testing Alcohol

Extracts from this document...

Introduction

Testing Alcohol Aim To find out if the number of carbon and hydrogen atoms in alcohol affect how well they burn. Apparatus Clamp stand, alcohol burners containing: methanol, ethanol and propanol, splints, goggles, heat mat, copper beaker, water, thermometer, scales, water. Method Put 100g of water in a copper beaker and put in a thermometer, record the temperature and attach to clamp stand. Weigh the alcohol burner containing methanol and record the result, place under the beaker. Light the alcohol burner and wait till the water has reached 10 c more than the starting temperature. Put out the alcohol burner and weigh again. ...read more.

Middle

24 24 24 24 End Temp ( c) 36 50 54 64 Change in temp ( c) 12 26 30 40 Start Weight (g) 217.8 164.1 175.34 216.53 End Weight (g) 216.53 159.82 172.46 213.51 Change in weight (g) 1.27 4.28 2.88 3.02 Ethanol 10 c 20 c 30 c 40 c Start temp ( c) 24 25 26 22 End temp ( c) 34 45 56 63 Change in temp ( c) 10 20 30 41 Start Weight (g) 119.96 255.60 135.06 119.09 End Weight (g) 119.09 254.18 132.92 117.03 Change in weight (g) 0.9 1.42 2.14 2.06 Propanol 10 c 20 c 30 c 40 c Start Temp ( c) ...read more.

Conclusion

I think the errors may have occurred because each group in our class was doing a separate part of the experiment, then we combined our results. This could mean that one group did the test slightly differently to the other. One group may have had the beaker further away from the flame than the other. Also the flame may have been longer for some groups than others, and this would cause a fluctuation in results. Some groups had different size beakers to other groups, meaning it would take more alcohol to heat up a smaller volume of water. If I were to repeat this experiment I would do the entire test by myself so I could ensure that all the tests were carried out in the same way. ...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

Here's what a star student thought of this essay

3 star(s)

Response to the question

A basic experiment. The candidate does not draw very valid conclusions as discussed below from their data and does not show scientific reasoning behind their statements. However, the candidate does show good consideration of possible errors in the experiment ...

Read full review

Response to the question

A basic experiment. The candidate does not draw very valid conclusions as discussed below from their data and does not show scientific reasoning behind their statements. However, the candidate does show good consideration of possible errors in the experiment by pointing out things that may have confounded the experiment which is good. Overall an okay baseline essay.

Level of analysis

The method should be set out in bullet points rather than continuous prose because this makes the different steps easier to follow and the text easier to read. The candidate does not make a prediction about the number of carbon and hydrogen atoms and the candidate should do this to show greater width of scientific research and a better understanding of the topic and experiment. The candidate states in their conclusion that they expected Propanolol to be the best alcohol and they should have stated why with a prediction earlier in the text rather than make sweeping statements in the conclusion without science to back their claims up. The candidate should also have stated what they kept the same e.g. mass of fuel to avoid bias in the experiment. By having different masses the candidate biased the experiment which makes their conclusion not very well thought out or valid. The conclusion points out some errors and do not point out any possible valid improvements which would indicate their understanding.

Quality of writing

The essay is set out into clear sub-sections which helps the reader to clearly identify each section. Spelling, grammar and punctuation are to a good standard and the candidate communicates concisely and clearly.


Did you find this review helpful? Join our team of reviewers and help other students learn

Reviewed by skatealexia 10/07/2012

Read less
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. Marked by a teacher

    Reaction of Alcohol Lab

    5 star(s)

    - Changes to brown colour - On pH paper, it turns to orange (pH value: 3) - Acidic Analysis: Both KMnO4 and Lucas Reagent help to differentiate between tertiary alcohol, secondary alcohol, and primary alcohol. From the results of KMnO4, Butanol A has no reaction, so it has to be the t-butanol.

  2. Marked by a teacher

    What an ester is, how it is made, examples of esters, animal testing issues ...

    4 star(s)

    To heat these together there is a safety hazard, as the ethanol is highly flammable- so a substitute would be using water from a kettle. Sulphuric acid is used as a catalyst in this experiment (to push the reaction to happen).

  1. Titration experiment - write up

    Skin contact: Wash off with water. If swallowed: have 2 -3 glasses of water and seek medical help. Eye contact: Immediately flush the eye with water. If irritation persists, seek medical attention. Skin contact: Wash off with plenty of water. If swallowed: Drink plenty of water and call for medical help. Apparatus: > sodium carbonate (2.65g)

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

    4.2 Biodiesel Biodiesel is probably the most environmentally friendly fuel as it is renewable and highly biodegradable. It does not accumulate and pollute soil and waterways, plus it is carbon neutral, which helps to improve local air quality. To run on biodiesel, diesel engines do not have to be modified, but using 100% biodiesel can create problems with engine performance.

  1. Investigate the enthalpy change of different alcohol

    Average (minute'second") 1cm 0'31"57 0'31"47 0'31"52 3cm 0'37"94 0'38"87 0'38"40 5cm 0'45"75 0'51"78 0'48"76 You can see that as the flame is further from the base of the can, the time needed for the temperature to reach 30C increase, more heat is lost to the surrounding.

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

    Methanol + ethanoic acid = methyl ethanoate + water. Amyl acetate has a chemical formula of CH3COO[CH2]4CH3. It has a scent of bannanas and apples. The chemical compound propyl acetate, also known as propyl ethanoate, is a common solvent. This clear, colourless liquid is known by its characteristic odour of pears.

  1. Section 1.4 ORGANIC HALIDES

    Aromatic compounds can have -OH groups attached, forming the aromatic alcohols. Ether: An organic compound with two alkyl groups attached to an oxygen atom. The two alkyl groups may be identical (R - O - R') or different (R' - O - R").

  2. GCSE Chemistry Revision Notes - everything!

    The reactivity of elements is related to the electron arrangement in their atoms. Elements, Compounds and Mixtures An element is a substance made up of only one type of atom. A compound is two or more different type of atom, chemically combined (bonded).

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