Chemistry A-Level
State symbols
What State symbols means in Chemistry A-Level, as defined for OCR.
Definitions of State symbols
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain State symbols in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The symbols (s), (l), (g) and (aq), which must match the physical state of each species under the stated conditions.
Symbols in an equation that must match the standard states when a standard enthalpy change is quoted.
Topics that use State symbols
- Compounds, formulae and equations (OCR A-Level)
- Enthalpy changes (OCR A-Level)
Related terms
- ∆H of combustion
- ∆H of formation
- Activation energy
- Approximate estimate
- Average bond enthalpy
- Averaging over gaseous compounds
- Balanced chemical equations
- Bond breaking and bond making
Using State symbols in the exam
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