Mixing! n moles of Ar and In moles of Xe (treated as ideal gases) are in adjacen
ID: 475739 • Letter: M
Question
Mixing! n moles of Ar and In moles of Xe (treated as ideal gases) are in adjacent containers with volumes of V and 2V, respectively. The barrier between the two gases is removed, and the two gases mix. Heat and work are not exchanged with the surroundings. Since the two gases start at the same temperature and pressure, the temperature and pressure must not change during mixing. What are delta U, delta H, and delta S for the system after it reaches equilibrium? What is the entropy change of the universe after the system reaches equilibrium? Is the process spontaneous?Explanation / Answer
5.
A) U=-ve
As the volume increase system does work and would have lower internal energy.
H=0
As no heat is exchanged with surrounding.
S=+ve
Mixing of gases leads to increased randomness.
B) entropy change of the universe=+ve
As the process is spontaneous.