Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed? A)($\Delta$H_soln 0,entropy of system decreases) B)($\Delta$H_soln $\approx$ 0,entropy of system decreases) C)($\Delta$H_soln $\approx$ 0,entropy change of system $\approx$ 0) D)($\Delta$H_soln $\approx$ 0,entropy of system increases) E)None of these choices is correct.

Question

Which of the following sets of conditions could exist when two liquids which are completely miscible in one another are mixed? A)($\Delta$H_soln > 0,entropy of system decreases) B)($\Delta$H_soln $\approx$ 0,entropy of system decreases) C)($\Delta$H_soln $\approx$ 0,entropy change of system $\approx$ 0) D)($\Delta$H_soln $\approx$ 0,entropy of system increases) E)None of these choices is correct.

Quizplus · Accepted Answer

When two liquids are completely miscible in one another, the entropy of the system usually increases because the mixing of the molecules allows for more microstates, which increases the disorder (entropy) of the system. Therefore, choice D is the best answer because it states that the entropy of the system increases after mixing. The other choices either have incorrect signs for the entropy change, or they do not provide enough information to determine the sign of the entropy change.

Which of the Following Sets of Conditions Could Exist When Δ\DeltaΔ

Which of the Following Sets of Conditions Could Exist When $\Delta$