Chapter 17, Problem 9STP

Interpretation Introduction

Interpretation:

The factor that cannot be predicted about the given reaction needs to be identified.

Concept introduction:

The entropy change of the system depends on factors like the nature of reactants, products, their amounts, the nature of reaction etc.

Answer to Problem 9STP

Option C cannot be predicted about this reaction.

Explanation of Solution

The initial states of the reactants are solid and liquid which have lower entropy as compared to the gaseous products. There the entropy change of the system will be negative and option C cannot be predicted about this reaction.

Conclusion

The entropy change of the reaction cannot be positive due to the state of the reactants and the products.