I would expect that you may not read this until tomorrow but lets hope... basically i think I was going down the wrong road when writing my conclusion, which is why I am lacking in a completed one. I understand the enthalpy decreases as the length of the hydrocarbon increases, and at first I thought "they have weaker intermolucular forces"
Am I right, an If so why do they have weaker forces? And If I am wrong, what is the answer? Google has not been very helpful!
I hope you find this before the end of the evening as I may not be able to finish otherwise, and I really don't want you to shout at me :(
Sorry
Anyone who can help please do x
Supporting Year 12 and 13 chemists at The Cavendish School in Hemel Hempstead
Markschemes for exam papers
Work from Wednesday's Year 12 lesson (5th March)
Revision resources
Work from recent lessons
Past A2 exam papers
Past AS exam papers
Links to Alevel Chemistry tick lists
AS and A2 Chemistry exam dates
AS exams: Wed, 4th Jun 2008
A2 exams (Unit 2849 retake): Thurs, 12th Jun 2008
A2 exams (Unit 2854): Thurs, 19th Jun 2008
A2 exams (Unit 2849 retake): Thurs, 12th Jun 2008
A2 exams (Unit 2854): Thurs, 19th Jun 2008
2 comments:
The enthalpy change increases (becomes more negative) as the carbon chain length gets longer! it's all to do with bond enthalpies. Think, what happens when you add an extra carbon atom? (extra hydrogen atoms + more products formed)!
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