Use relevant enthalpy changes from the tables to answer this question.
reaction

C(s) + 2H₂(g) → CH₄(g) ΔН/kJ mol^-1-76
CH₄(g) + 2O₂(g) -- CO₂(g) + 2H₂O(g) ΔН/kJ mol⁻¹ is -890
CH₄(g) → C(g) + 4H(g) ΔН/kJ mol⁻¹ is 1648
3C(s) + 4H₂(g) СзН₈(g) ΔН/kJ mol⁻¹ is -105
bond bond enthalpy
Н-Н 436
C-C. 350
C=C 610
C=0 805
Which value can be calculated for the enthalpy change for the following reaction?
2C(g) + 6H(g) → C₂H₆(g)