Question

Calculate the standard enthalpy change of combustion of methane using the following bond energies.
E(C-H) = +412kJmol-1
E(O=0) = +496kJmol-1
E(C=0) = +805kJmol-
ECO-H) = +463kJmol-1
Energy required when bonds are broken (kJ) =

Answer 1

Answer:

Calculate enthalpy of formation of methane (CH4) from the following data :

(i) C (s) + O2 (g)→ CO2 (g), ΔrH° = – 393.5 kJ mol–1

(ii) H2 (g) +1/2 O2 (g) →H2O(l),ΔrH° = – 285.8 kJ mol–1

(iii) CH4 (g) + 2O2 (g) → CO2 (g) + 2 H2O (l),ΔrH° = –890.3 kJ mol–1