The value of ΔS° for the catalytic hydrogenation of acetylene to ethene, C₂H₂ (g) + H₂ (g) → C₂H₄ (g)
Is ________ J/K∙ mol.

Name: The value of ΔS° for the catalytic hydrogenation of acetylene to ethene, C 2 H 2 (g)+ H 2 (g)→ C 2 H 4 (g) Is ________ J/K∙ mol.
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Question

The value of ΔS° for the catalytic hydrogenation of acetylene to ethene, C₂H₂ (g)+ H₂ (g)→ C₂H₄ (g) Is ________ J/K∙ mol.

Quizplus · Accepted Answer

The value of ΔS° for a reaction indicates the change in entropy. In the given reaction, the number of gas molecules decreases from 2 to 1, which typically results in a decrease in entropy, thus ΔS° should be negative.

The Value of ΔS° for the Catalytic Hydrogenation of Acetylene