Chemistry in society
Enthalpy and energy calculations
Use an appropriate energy relationship and keep the sign and units consistent.
One type, 5 sittings. Repeated examples stay together rather than becoming duplicate catalogue entries.
Open a linked question page and attempt the relevant question on paper or in your own notes. Then expand the marking instructions and check the same question number. Responses are not entered or saved on this page.
Grouping is rule-assisted and provisional. Always check the complete question, qualification, year and any supporting material. PDF viewer page numbers may differ from the printed page numbers.
Response forms found on linked pages
These describe the source-page wording, not a separate type count. A page may contain several subparts.
Choose a source example.
2 linked pages in 2025. The different years are examples of this same skill family, not additional types.
- Open question page (PDF opens in a new tab)
2025 · Section2
Official PDFPDF viewer page 28. Other questions may share this page; choose the question or subpart testing enthalpy and energy calculations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · mi (PDF opens in a new tab) - Open question page (PDF opens in a new tab)
2025 · Section2
Official PDFPDF viewer page 29. Other questions may share this page; choose the question or subpart testing enthalpy and energy calculations.
Check the published marking instructions
Match the question number in the paper. These links open complete marking PDFs; a matching marking page has not been inferred.
2025 marking · mi (PDF opens in a new tab)
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