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4. A certain endothermic reaction X carried out room temperature (273K) has an enthalpy change of 20 Kcal/mol and an entropy change of 10 Kcal/K/mol. i) Calculate the Gibbs free energy (AG) of this reaction. ii) Is this reaction spontaneous or non-spontaneous? Give a reason for your answer 5. Thiomethane reacts with compound A via an SN1 reaction. Complete its reaction equation below. ii) SH Compound A ii) Draw the mechanism of reaction for this reaction. 6. Butyl Chloride undergoes an elimination reaction when reacted with sodium ethoxide to form butene. The reaction equation is given below with two reaction products A and B. low inevloa CI noitsups p *OEt B Which is the major product, and which is minor product. (Hint: Look up how the size of the base affects the elimination reaction product) Give a reason for your answer.