Reply To:reaction enthalpy Calculation 1 (thermo-13) Calculate The Standard reaction enthalpy the following: reaction: H2(g) + 1/8 S8 (s) ⇄ H2S(g)

Lösung:

The following: Values for ΔHof can from Tables and tables withdrawn will be. In the event a Value not found will be: In general further calculation with x, y and so on.
H₂(g) + 1/8 S₈ (s) ⇄ H₂S(g)
ΔHof(H₂(s)) = 0 kJ/mol
ΔHof(S₈(s)) = 0 kJ/mol
ΔHof(H₂(g)) = x kJ/mol
ΔHoR = ∑ΔHof(Produkte) – ∑ΔHof(Edukte)
ΔHoR = ΔHof(H₂S(s)) – ( ΔHof(H₂(s)) + 1/8 ΔHof(S₈(s)) )
ΔHoR = x – (0 + 0) = x