AQA A-level Chemistry paper 2 Frequently Most Tested Questions and Verified Accurate Answers
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Course
AQA
Institution
AQA
Relative atomic mass (Ar)
Average mass of an atom compared with one twelth of the mass of an atom of carbon 12
Electronegativity
Power of an atom to attract the pair of electrons in a covalent bond
Standard enthalpy of combustion
Enthalpy change when 1 mole of a substance burns completely i...
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AQA A-level Chemistry paper 2
Frequently Most Tested Questions and
Verified Accurate Answers
Relative atomic mass (Ar)
✓ Average mass of an atom compared with one twelth of the mass of an atom of carbon 12
Electronegativity
✓ Power of an atom to attract the pair of electrons in a covalent bond
Standard enthalpy of combustion
✓ Enthalpy change when 1 mole of a substance burns completely in oxygen under standard
conditions with all reactants and products being in their standard state
Standard enthalpy of formation
✓ Enthalpy change when 1 mole of a compound is formed from it's elements under standard
conditions in their standard states
Mean bond enthalpy
✓ The average energy needed to break a certain type of bond over a range of compounds
Activation energy
✓ Minimum energy required for colliding molecules to react
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