BRAINCAKEBond Enthalpy Question - 8
Question
The standard enthalpy change of formation of ammonia is -46 kJ mol-1. Use this and the bond enthalpies below to calculate the mean N-H bond enthalpy.
Bond enthalpies / kJ mol-1: N≡N 945, H-H 436
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- mean bond enthalpy
- The average energy needed to break one mole of a particular covalent bond, measured over a range of compounds, with all species gaseous.
- enthalpy change of formation
- The enthalpy change when one mole of a compound is formed from its elements in their standard states, under standard conditions.
More in Bond Enthalpy
- Calculations using Mean Bond Enthalpies
- Bond Enthalpy Question - 1
- Bond Enthalpy Question - 2
- Bond Enthalpy Question - 3
- Bond Enthalpy Question - 4
- Bond Enthalpy Question - 5
- Bond Enthalpy Question - 6
- Bond Enthalpy Question - 7
All 10 lessons in Bond Enthalpy · All Edexcel AS-level Chemistry topics