InterviewSolution
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InterviewSolution
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Gvien the following value for the standard molar Gibbs free energy changes? `G^(@)`, at `25^(@)C` `Ag^(+) (aq) + 2NH_(3) (l) hArr Ag (NH_(3))_(2)^(+) (aq) ? G^(2) = -41.0KJ (mol Ag^(+))^(-1) Ag^(+) (aq) + Cl^(-)(aq) hArr AgCl (s) ? G^(@) = - 55.6 kJ (mol Ag^(+))^(-1)` Calculate the value for the thermodynamic equilibrium constant. K, at `25^(@)C` for the reactions: `AgCl (s) + 2NH_(3) (l) hArr Ag (NH_(3))_(2)^(+) (aq) + Cl (aq)`A. `3.62 xx 10^(2)`B. `1.00`C. `9.94 xx 10^(-1)`D. `2.76 xx 10^(-3)` |
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Answer» Correct Answer - D Reversing the 2nd equation and adding into 1 st equation gives `Ag Cl (s) + 2NH_(3) (l) hArr Ag (NH_(3))_(2)^(+) (aq) + Cl^(-) (aq)` `Delta G^(@) = 14.6 kJ` Also, `Delta G^(2) = 14.6 xx 100 J` `=-2.303 xx 298 xx 8.314` log `K rArr K = 2.76 xx 10^(-3)` |
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