a) Determine whether ammonium nitrate (NH4NO3) will dissolve in distilled water at a temperature of 30 °C or not by calculating the Gibbs energy for this process. In your calculation, use the enthalpy and entropy values given in the table below. b) Using the results from a), calculate the theoretical temperature limit for dissolving NH4NO3 in distilled water. Compound NH4NO3 (S) NH4+ (aq) NO3(aq) Enthalpy / kJ mol-¹ -365 -130 -204 Entropy / J mol-¹ K-¹ 150 115 145

a) Determine whether ammonium nitrate (NH4NO3) will dissolve in distilled water at a temperature of 30 °C or not by calculating the Gibbs energy for this process. In your calculation, use the enthalpy and entropy values given in the table below. b) Using the results from a), calculate the theoretical temperature limit for dissolving NH4NO3 in distilled water. Compound NH4NO3 (S) NH4+ (aq) NO3(aq) Enthalpy / kJ mol-¹ -365 -130 -204 Entropy / J mol-¹ K-¹ 150 115 145

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

16) Dissolving of a salt
a) Determine whether ammonium nitrate (NH4NO3) will dissolve in distilled water at a
temperature of 30 °C or not by calculating the Gibbs energy for this process. In your
calculation, use the enthalpy and entropy values given in the table below.
b) Using the results from a), calculate the theoretical temperature limit for dissolving
NH4NO3 in distilled water.
Compound
NH4NO3 (S)
NH4+ (aq)
NO3- (aq)
Enthalpy / kJ mol-¹
-365
-130
-204
Entropy / J mol-¹ K-1
150
115
145

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Step 1: (a)Calculation of enthalpy change of reaction

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Step 2: Calculation of entropy change of reaction

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Step 3: Calculation of Gibbs free energy

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Step 4: Concept of spontaneity

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