Chemistry A-Level
Standard enthalpies of formation and combustion
What Standard enthalpies of formation and combustion means in Chemistry A-Level, as defined for OCR.
Definition of Standard enthalpies of formation and combustion
Check what you remember
Read the wording for your board, then hide it and explain Standard enthalpies of formation and combustion in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Typical cases of the calculation use standard enthalpies of formation from elements or standard enthalpies of combustion to the same oxides.
Topics that use Standard enthalpies of formation and combustion
- Enthalpy changes (OCR A-Level)
Related terms
- ∆H of combustion
- ∆H of formation
- Activation energy
- Approximate estimate
- Average bond enthalpy
- Averaging over gaseous compounds
- Bond breaking and bond making
- Bond enthalpy
Using Standard enthalpies of formation and combustion in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge