Using thermodynamic data given below, calculate the Gibbs free energy change, ΔG°rxn for the following reaction  Fe (s) + 2HCl (g) → FeCl2 (s) + H2(g) Gibbs free energies of formation (ΔGf°) in kJ/mol: Fe (s) = 0 ; FeCl2(s) = - 302.3; H2(g) = 0; HCl(g) = -95.3

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