The enthalpy of the reaction is 226.73 kJ when 1 mol of C2H2 is formed.
What is enthalpy?
Enthalpy is the sum of the internal energy. and pressure times volume.
[tex]2 C (s, graphite) + H_2 (g)[/tex] → [tex]C_2H_2 (g)[/tex]
The enthalpy of formation (ΔHf) of [tex]C_2H_2[/tex] (g) is 226.73 kJ/mol.
The enthalpy of formation of C (s, graphite) is zero because Carbon is in its elemental state.
The enthalpy of formation of [tex]H_2[/tex] (g) is zero because is taken as a reference.
ΔHrx = ∑ΔHf of products - ∑ΔHf of reactants
ΔHrx = 226.73 kJ/mol X 1 mol - 0
= 226.73 kJ
Hence, the enthalpy of the reaction is 226.73 kJ when 1 mol of [tex]C_2H_2[/tex] is formed.
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