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Consider the following chemical reaction, carried out at T = 25.0 °C.             NH3(aq) + CH3COOH(aq)  D  NH4+(aq) +...

Consider the following chemical reaction, carried out at T = 25.0 °C.

            NH3(aq) + CH3COOH(aq)  D  NH4+(aq) + CH3COO-(aq)                                            (4.1)

Thermochemical data to be used in this problem are given below at T = 25.0 °C.

            Substance                        DH°f                     S°                   DG°f                     

                                                (kJ/mol)             (J/molK)           (kJ/mol)

            CH3COO-(aq)                 - 486.01             +   86.6              - 369.31

            CH3COOH(aq)                - 485.76             + 178.1              - 396.46

            NH4+(aq)                        - 132.51             + 113.4              - 79.31

            NH3(aq)                         -   80.29             + 111.3              - 26.50

a) Using the data in the table, find the value DG°rxn for reaction 4.1

b) Give the expression for K, the thermodynamic equilibrium constant, for reaction 4.1

c) What is the numerical value for K for reaction 4.1?

d) Will the numerical value for K for reaction 4.1 at T = 50.0 °C be larger than, equal to, or smaller than the value at T = 25.0 °C.  Justify your answer.  (HINT: Think of how Le Chatlier’s principle applies.)

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