Chemistry A-Level
Standard state
What Standard state means in Chemistry A-Level, as defined for OCR.
Definition of Standard state
Check what you remember
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Reference: OCR
The physical state of an element or compound under standard conditions, such as liquid water or gaseous oxygen at 298 K and 100 kPa.
Topics that use Standard state
- 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 state in the exam
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