Question

What is total change in entropy equal to?

• A. The standard entropy multiplied by the number of moles
• B. The standard entropy multiplied by the temperature of the system
• C. The standard entropy squared multiplied by the number of moles
• D. The standard entropy squared multiplied by the temperature of the system

Answer 1

The total change in entropy is equal to the sum of the standard entropies of the products minus the sum of the standard entropies of the reactants, scaled by their stoichiometric coefficients. Therefore, the correct option is A.

Step-by-step explanation:

The total change in entropy, denoted as ΔS, is equal to the sum of the standard entropies of the products minus the sum of the standard entropies of the reactants, scaled by their stoichiometric coefficients. It can be represented as:

ΔS = Σ(S°(products)) - Σ(S°(reactants))

where S° represents the standard entropy of a substance under standard conditions, and Σ indicates the sum of the entropies of the products and reactants. Therefore, the correct answer is:

Option A. The standard entropy multiplied by the number of moles