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Thermite reactions are highly exothermic reactions between a metal oxide and a fine metal powder. The exothermic nature of the reaction is used for welding metal parts such as railway tracks. One hypothetical reaction of this type is: A203 (s) +2B(5) B2O3(s) + 2 A (s) If the surroundings absorb 800.0 kJ/mol of heat due to the reaction, answer the following questions using the table of data provided below (determined at 298 K): Molecule S (JK 'mol ) A203 (5) 80.3 B(s) 25.6 B2O3 (5) 54.2 A (5) 28.2 a) Determine AS y for the reaction at 298 K AS sys: JK-mol 1 b) What is the value of A Suy for the reaction at 298 K. A Suniy : JK 'mol-!