complete the following reaction CO(g) h H2(g) ∆ catalyst ________
Answers
Answer:
Explanation:
11th
Chemistry
Thermodynamics
Enthalpy Change of a Reaction
The Δf H^∘ for CO2 (g), CO...
Chemistry
The Δ
f
H
∘
for CO
2
(g),CO(g)andH
2
O(g) are −393.5,−110.5 and −241.8kJmol
−1
respectively. The standard enthalpy change (in kJ) for the reaction is:
CO
2
(g)+H
2
(g)⟶CO(g)+H
2
O(g)
Hard
Answer
First write the balanced chemical reactions for the formation of carbon dioxide, carbon monoxide and water.
C+O
2
⟶CO
2
;ΔH
∘
=−393.5kJ ... (i)
C+
2
1
O
2
⟶CO;ΔH
∘
=−110.5kJ ...(ii)
H
2
+
2
1
O
2
⟶H
2
O;ΔH
∘
=−241.8kJ ...(iii)
Then obtain the required equation by equating (ii)+(iii)−(i):
CO
2
+H
2
⟶CO+H
2
O;ΔH
∘
=+41.2
Hence, the standard enthalpy change for the reaction is 41.2 kJ/mol