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IB Approved Workshops
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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Recommendations
Hi fellow chemistry teachers. I am leaving IB this year but ABSOLUTELY recommend that you lobby your coordinators and administrators to get access to this site. It is something I wish i had done/been aware of and done YEARS ago. Geoff makes things easily...
Jeff Hinton
Greengate School (Mexico)
Quote of the day
A chemist who does not know mathematics is seriously handicapped.
(Irving Langmuir, 1881-1957)
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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...