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reaction enthalpy Calculation 1 (thermo-13)

Calculate The Standard reaction enthalpy the following: reaction:
H₂(g) + 1/8 S₈ (s) ⇄ H₂S(g)

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The following: Values for ΔHof can from Tables and tables withdrawn will be.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