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ChemistryChemistry & Chemical ReactivityThe signs for Δ r S ° and Δ r H ° with respect to the reaction of sodium with water should be predicted without using calculations. Concept introduction: The standard entropy change for any reaction is the sum of standard molar entropies of products, subtracted from the sum of standard molar entropies of reactants. The standard molar entropies are multiplied by the stoichiometric coefficient which is as per the balanced equation. Δ r S ° = ∑ n S ° ( products ) − ∑ n S ° ( reactants ) The enthalpy change for any reaction can be expressed similarly, Δ r H ° = ∑ n H ° ( products ) − ∑ n H ° ( reactants ) The sign of Δ r H ° tells if the reaction is exothermic or endothermic.Start your trial now! First week only $4.99!*arrow_forward*

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9th Edition

John C. Kotz + 3 others

Publisher: Cengage Learning

ISBN: 9781133949640

Chapter 18, Problem 47GQ

Interpretation Introduction

**Interpretation:**

The signs for

**Concept introduction:**

The standard entropy change for any reaction is the sum of standard molar entropies of products, subtracted from the sum of standard molar entropies of reactants. The standard molar entropies are multiplied by the stoichiometric coefficient which is as per the balanced equation.

The enthalpy change for any reaction can be expressed similarly,

The sign of