Does anyone have a easy way of remembering enthalpy change, enthalpy profile diagrams, and enthalpy change of combustion? As level, Ocr unit 2

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I'm really having trouble remembering any of it, i know things like exothermic is negitive and endothermic is positive, but when i do mock tests my mind goes blank :S

All help is much appreciated

Thanks :)

Posted Tue 15th May, 2012 @ 20:22 by Shannon

3 Answers

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What exactly are you struggling remembering?

I'm on AQA so i suppose what my spec asks me to know is different.

Answered Wed 16th May, 2012 @ 15:55 by Daryl Ladd
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i had the same problem shannon, my chemistry teacher said that keep practicing drawing and writing the definitions untill you are dead perfect...i know its a bit teadious as they say practise makes perfection

Answered Thu 17th May, 2012 @ 10:05 by ELectrica!
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i remember calculating enthalpy change in combustion but useing CR-P which when you add an 'a' where the line is it spells a slightly rude word.

It stands for Combustion= Rectants - Products

then formation is the other way around.

Formation= Products - Reactants
so FP-R

Answered Wed 23rd May, 2012 @ 09:29 by De-Anna