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Problem 6.41

Expert-verified
Found in: Page 243

### Organic Chemistry

Book edition 5th
Author(s) Janice Gorzynski Smith
Pages 1256 pages
ISBN 9780078021558

# For which of the following reactions is a positive value?a.b.

1. is positive.
2. No change in .
See the step by step solution

## Step-by-Step SolutionStep 1: Entropy Change

The entropy change is the change in the randomness of the system when the reactants undergo a reaction to form products.

Conventionally, the value of entropy should be higher for products.

## Step 2: Comparison of Entropy for reactants and products

When two reactants combine to form a single product, the disorderliness decreases. Hence, the entropy of the system decreases in going from reactants to products.

When a single reactant dissociates to form two or more products, the randomness in the products increases, hence, the entropy of the products increases, and that is favored.

## Step 3: Explanation

1. Since the number of molecules in the products is more than the number of molecules of reactants the entropy of the products is more. Hence, is positive.
2. The number of molecules of reactants and products is the same. Hence, there is no change in the entropy of the system. So, neither of the products or the reactants are favored.