Chemistry A-Level
Zero value for elements
What Zero value for elements means in Chemistry A-Level, as defined for OCR.
Definition of Zero value for elements
Check what you remember
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Reference: OCR
An element in its standard state has ∆fH = 0 by definition.
Topics that use Zero value for elements
- 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 Zero value for elements in the exam
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