
To find:
a) The sign of
b)
c) If the calculations support the prediction for the sign of

Answer to Problem 12.80QA
Solution:
a) The sign of
b)
c) The calculations support the predictions.
Explanation of Solution
1) Formula:
Here
2) Concept:
Entropy is a state function of the chemical and physical state of a system and not the pathway followed to reach that state. Therefore, the change in entropy is calculated by the entropy of final and initial state of reaction. The formula is given above. In other words, entropy is the measure of randomness or disorder of the system. Therefore, the order of entropy of three phases of substance is
3) Given information:
Substance | ||||||
4) Calculations:
Calculation for
In this reaction, randomness or entropy change goes on increase from solid to aqueous phase (product to reactant). But as the
Calculation for
In this reaction, randomness increases from product to reactants. Therefore the change in entropy is negative. Thus, this is a non-spontaneous reaction
Conclusion:
a. The sign of
b.
c. Calculations do support the prediction.
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Chapter 12 Solutions
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