BRAINCAKEBond Enthalpy
Revision notes for Bond Enthalpy in Edexcel Chemistry (8CH0). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Bond EnthalpiesChemical reactions involve breaking bonds in the reactants and making new bonds in the products.
- Calculations using Mean Bond EnthalpiesTo estimate an enthalpy change from bond enthalpies, imagine the reaction happening in two stages: first every bond in the reactants is broken, then…
- Bond Enthalpy Question - 1Question Use mean bond enthalpies to estimate the enthalpy change of combustion of methane, with all substances as gases: CH4(g) + 2O2(g) → CO2(g) +…
- Bond Enthalpy Question - 2Question Estimate the enthalpy change for the hydrogenation of ethene: C2H4(g) + H2(g) → C2H6(g) Mean bond enthalpies / kJ mol-1: C=C 612, C-C 347…
- Bond Enthalpy Question - 3Question Estimate the enthalpy change for the Haber process reaction and compare it with the data book value.
- Bond Enthalpy Question - 4Question A bond enthalpy calculation can be rearranged to find an unknown bond enthalpy when ΔH is known.
- Bond Enthalpy Question - 5Question Estimate the enthalpy change for the reaction of methane with chlorine in UV light: CH4(g) + Cl2(g) → CH3Cl(g) + HCl(g) Mean bond…
- Bond Enthalpy Question - 6Question Estimate the enthalpy change for the combustion of gaseous ethanol: C2H5OH(g) + 3O2(g) → 2CO2(g) + 3H2O(g) Mean bond enthalpies / kJ mol-1…
- Bond Enthalpy Question - 7Question Use bond enthalpies to estimate the standard enthalpy change of formation of water vapour, and compare it with the data book value of…
- Bond Enthalpy Question - 8Question The standard enthalpy change of formation of ammonia is -46 kJ mol-1.