DeltaH=21 T=21.2 degrees C DeltaS= 0.071 Is the dissolution process studied today, NaNO3 (s) → Na+ (aq) + NO3– (aq) spontaneous or nonspontaneous? How can you tell? What is the sign of ∆G? 2. Using the class’s mean value for ∆H, and the Gibbs-Helmholtz equation, estimate the value for ∆S for the dissolution process. 3. Based on your observation about the spontaneity of the reaction and the sign of ∆H, is the value of ∆S that you calculated a minimum or a maximum? Explain. 4. Looking at the chemical equation above, would you predict that the sign of ∆S for the dissolution process is positive or negative? Explain. 5.Does the sign of your calculated entropy change agree with your prediction in question 4?If not, give a possible explanation. 6.Is a spontaneous process necessarily exothermic? Give examples to support your answer.
DeltaH=21 T=21.2 degrees C DeltaS= 0.071 Is the dissolution process studied today, NaNO3 (s) → Na+ (aq) + NO3– (aq) spontaneous or nonspontaneous? How can you tell? What is the sign of ∆G? 2. Using the class’s mean value for ∆H, and the Gibbs-Helmholtz equation, estimate the value for ∆S for the dissolution process. 3. Based on your observation about the spontaneity of the reaction and the sign of ∆H, is the value of ∆S that you calculated a minimum or a maximum? Explain. 4. Looking at the chemical equation above, would you predict that the sign of ∆S for the dissolution process is positive or negative? Explain. 5.Does the sign of your calculated entropy change agree with your prediction in question 4?If not, give a possible explanation. 6.Is a spontaneous process necessarily exothermic? Give examples to support your answer.
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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DeltaH=21 T=21.2 degrees C DeltaS= 0.071
Is the dissolution process studied today,
NaNO3 (s) → Na+ (aq) + NO3– (aq)
spontaneous or nonspontaneous? How can you tell? What is the sign of ∆G?
2. Using the class’s mean value for ∆H, and the Gibbs-Helmholtz equation, estimate the value for ∆S for the dissolution process.
3. Based on your observation about the spontaneity of the reaction and the sign of ∆H, is the value of ∆S that you calculated a minimum or a maximum? Explain.
4. Looking at the chemical equation above, would you predict that the sign of ∆S for the dissolution process is positive or negative? Explain.
5.Does the sign of your calculated entropy change agree with your prediction in question 4?If not, give a possible explanation.
6.Is a spontaneous process necessarily exothermic? Give examples to support your answer.
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