Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed? A)Δ H _soln 0, entropy of system decreases B)Δ H _soln ≈ 0, entropy of system decreases C)Δ H _soln ≈ 0, entropy change of system ≈ 0 D)Δ H _soln ≈ 0, entropy of system increases E)None of these choices are correct.

Question

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed? A)Δ H _soln > 0, entropy of system decreases B)Δ H _soln ≈ 0, entropy of system decreases C)Δ H _soln ≈ 0, entropy change of system ≈ 0 D)Δ H _soln ≈ 0, entropy of system increases E)None of these choices are correct.

Quizplus · Accepted Answer

When two liquids that are completely miscible in one another are mixed, the enthalpy change is typically close to zero because there is no significant energy required to overcome intermolecular forces between the two liquids. However, the entropy of the system increases because the mixing of the two liquids leads to an increase in disorder. Therefore, the correct answer is D, where the enthalpy change is close to zero and the entropy of the system increases.

Which of the Following Sets of Conditions Could Exist When