Question

question 18 of 30
what does a change in the entropy of a system indicate?

a. that the equilibrium position has changed
b. that the activation energy has changed
c. that the disorder of the system has changed
d. that the energy of the system has changed

Explanation:

• Option A: Equilibrium position change is related to factors like concentration, temperature (for some reactions), or pressure (for gaseous reactions), not directly to entropy change. Entropy is about disorder, not equilibrium position shift.
• Option B: Activation energy is related to the energy barrier for a reaction to occur, and it is changed by catalysts or reaction mechanisms, not by entropy changes. Entropy and activation energy are different concepts.
• Option C: Entropy is a thermodynamic quantity that measures the disorder or randomness of a system. So a change in entropy indicates a change in the disorder of the system. This matches the definition of entropy.
• Option D: The energy of a system (like internal energy) is related to factors such as heat and work, and a change in energy doesn't directly correspond to a change in entropy. Entropy is about disorder, not the total energy of the system.

Answer:

C. That the disorder of the system has changed