Question

Calculate the standard entropy change of the following reaction: 2Fe(s) + 3Cl2(g) → 2FeCl3(s) Given that the standard enthalpy change for this reaction is -400 kJ/mol at 298 K and the standard molar entropy of FeCl3(s) is 95 J/mol K.

Answer 1

To calculate the standard entropy change  S  for the reaction, we need the standard molar entropies of all the reactants and products. We are given the standard molar entropy of FeCl3 s , but we also need the standard molar entropies of Fe s  and Cl2 g .Unfortunately, without the standard molar entropies of Fe s  and Cl2 g , we cannot directly calculate the standard entropy change for the reaction. However, if you can provide the standard molar entropies of Fe s  and Cl2 g , we can proceed with the calculation.Alternatively, if you have the Gibbs free energy change  G  for the reaction, we can use the following equation to calculate the standard entropy change:G = H - TSWhere G is the Gibbs free energy change, H is the standard enthalpy change, T is the temperature in Kelvin, and S is the standard entropy change. If you can provide the Gibbs free energy change, we can solve for the standard entropy change.