Consider the reaction.
2 upper C (s, graphite) plus upper H subscript 2 right arrow upper C subscript 2 upper H subscript 2 (g).
Standard Enthalpies of Formation
Substance
DHf (kJ/mol)
C2 H2 (g)
226.73
CaCO3 (s)
-1206.92
CaO (s)
-635.09
CO (g)
-110.525
CO2 (g)
-393.509
H 2 O (I)
-285.8
H 2 O (g)
-241.818
C (s), diamond
1.895
C (s), graphite
0.0
Based on the equation and the information in the table, what is the enthalpy of the reaction?
Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants ...
-453.46 kJ
-226.73 kJ
226.73 kJ
453.46 kJ
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