The following thermochemical equations are given: (1) C(graphite) + O₂(g) → CO₂(g) ΔH…
CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
The following thermochemical equations are given:
(1) C(graphite) + O₂(g) → CO₂(g) ΔH = –393.5 kJ
(2) H₂(g) + 21O₂(g) → H₂O(l) ΔH = –285.8 kJ
(3) CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) ΔH = –890.3 kJ
Using these data, determine ΔH for the formation reaction
C(graphite) + 2H₂(g) → CH₄(g).
(a) +211 kJ
(b) −497 kJ
(c) −74.8 kJ
(d) +74.8 kJ
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