Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question

The equilibrium constant for the equation

      HNO2 (aq)  +  H2O (l)    ⇌    H3O+ (aq)  +  NO2− (aq)

is Ka = 5.6 × 10−4 M at 25.0 °C.

a) Calculate the value of ΔG°rxn, in kJ/mol, at 25.0 °C.

b) Calculate the value of ΔGrxn, in kJ/mol, at 25.0 °C when [NO2−] = [H3O+] = 1.0 ×10−5 M and [HNO2] = 1.00 M. 

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Step 1: Relation between Gibbs free energy change and specie concentrations
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Step 2: Calculation for standard Gibbs free energy change
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Step 3: Calculation for Gibbs free energy change
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