A-level Chemistry Energetic help practical
We have done an energetic practical in Chemistry, where we find out the enthalpy change of combustion for different alcohols, by doing a calorimeter experiment and using them as fuel to heat water.
From the experiment it was found that the higher the number of carbon atoms in the fuel, the more negative the enthalpy change of combustion. Then we had to research the actual values for the alcohols, which were much more negative than our results, but still followed the same trend.
The reason for this, I have stated, is that less energy was lost to the surroundings in the professional experiments, as better insulating equipment and apparatus was used. Is this right?
Is it accurate to say as they are more negative they are"more exothermic", and also, by being more negative, does this mean more energy is able to heat the water?
From the experiment it was found that the higher the number of carbon atoms in the fuel, the more negative the enthalpy change of combustion. Then we had to research the actual values for the alcohols, which were much more negative than our results, but still followed the same trend.
The reason for this, I have stated, is that less energy was lost to the surroundings in the professional experiments, as better insulating equipment and apparatus was used. Is this right?
Is it accurate to say as they are more negative they are"more exothermic", and also, by being more negative, does this mean more energy is able to heat the water?
Yes you are right. I cant see any problem there 
Quick Reply
Related discussions
- year 12 study journal!
- Access to Science course
- Do you have any questions about studying Pharmacy? - Kingston University
- A Level Chem websites for questions
- Chemistry Olympiad question
- A Level Chemistry HELP
- Edexcel A-Level Chemistry Paper 1 Core Inorganic and Physical Chemistry [Exam Chat]
- energetics a level chem help!
- Grade Growth Chronicles | From C's to A's (23-24)
- My yr 12 gyg :D
- Enthalpy change what moles do I use?! Help!
- AS/A Level Chemistry Study Group 2023/2024
- Are the CGP books good for these A level subjects?
- Revision for A level
- GCSE Exam Discussions 2024
- Self-teaching Chemistry A-level (as a private candidate)?
- Is colorimetry and calorimetry the same thing?
- Chemistry question- energetics
- Edexcel A-Level Physics without practical.
- As level chemistry paper 1
Latest
Last reply 2 minutes ago
Haven't heard back from LSELast reply 5 minutes ago
GCSE Maths - Get help and advice from an ex-tutor who specialised in GCSE Maths.Last reply 9 minutes ago
Anyone got an offer for medicine with an access to HE course?Posted 12 minutes ago
Changes to UoB term dates and assessment period questionsLast reply 13 minutes ago
Children to no longer be prescribed puberty blockers, NHS England confirmsLast reply 17 minutes ago
Official Cambridge Postgraduate Applicants 2024 ThreadLast reply 18 minutes ago
Muslim girl who is unsure if she wants to wear hijabLast reply 20 minutes ago
Official London School of Economics and Political Science 2024 Applicant ThreadLast reply 20 minutes ago
Official: University of Bristol A100 2024 Entry ApplicantsPosted 21 minutes ago
Barclays Graduate Scheme with Graduate Visa
