General Chemistry 4th Edition University Science Books presented by Sapling Lear

Question

General Chemistry 4th Edition University Science Books presented by Sapling Learning Map Calculate the standard entropy, AS'nxm, of the following reaction at 25.0 °C using the data in this table The standard enthalpy of the reaction, AHran, is -633.1 kJ mor-1 Number J.K1. mol Then, calculate the standard Gibbs free energy of the reaction, AGrxn Number kJ mol" Finally, determine which direction the reaction is spontaneous as written at 250°C and standard pressure forward reverse O both O neither Next E e Check Answer O Previous Give Up & View Solution

Explanation / Answer

Solution :-

Formula to calculate the delta S rxn is as follows

Delta S rxn = sum of delta S product - sum of delta S reactant

                     = [C6H6(l)*1] – [ 3* C2H2]

                     = [172.8*1] – [200.85*3]

                    = -429.75 J/K mol

Now lets calculate the delta G of the reaction

Delta G= Delta H – (T*delta S)

             = -633.1 kJ/ mol – (298 K * (-429.75 J per mol K * 1 kJ / 1000 J))

             = -505.035 kJ/mol

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