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Chemistry (New Syllabus)
IB DP Category 2
Berlin, Germany, 23 - 25 August 2024
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Chemistry (New Syllabus)
IB DP Category 1
Online (IB Approved), 25 - 27 October 2024
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You are doing a wonderful job by helping IB teachers to have materials which helps them prepare their lessons. I cherish the way each topic gives a presentation which helps the teacher to arouse the interest of the learners before moving into the main...
Chidiebere Obi Machabeng College
International School of Lesotho (Lesotho)
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A mind which has once imbibed a taste for scientific enquiry, and has learned the habit of applying its principles readily to the cases which occur, has within itself an inexhaustible source of pure and exciting contemplations.
(John Fredrick William Herschel, 1792-1871)
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A useful chromatography resource from the RSC
The Royal Society of Chemistry has just published a useful resource for students that covers chromatography for the 16-18 year age group. It...
Progress in carbon capture?
This blog looks at a promising recent development which could lead to capturing carbon dioxide emissions from the combustion of fossil fuels...
Subscriber commentsSee all
- Hi Geoff, Thanks so much for your quick reply. That is a great stress reliever. Pete
- Ah, yes the total calculate enthalpy is 5! Thank you
- Hi Carol, I think the confusion arises because there are 5 bond enthalpies involved in the calculation of the enthalpy change and the value for the calculated enthalpy change works out to be 5 kJ mol-1. As you say to find the percentage uncertainty...
- Hi, I am looking at a question form Nov 2023 SL P2.Assuming a 0.1 % uncertainty for each bond enthalpy, determine the resultant percentage uncertainty of the calculated enthalpy change of the reaction.The answer says you must add the absolute...