Consider a container with a partition in the middle. The container is thermally

Question

Consider a container with a partition in the middle.
The container is thermally isolated from the
environment. Initially one half of the container is filled
with gas A (N molecules) and the other half with gas B
(also N molecules). Both gases are kept at the same
pressure and the same temperature: pA = pB = p0; TA =
TB = T0. Then the partition is removed and the gases

are allowed to mix.
(a) Assuming that the temperature of the container does not change upon mixing, calculate
the entropy of the container before and after the removal of the partition.

(b) What is the entropy of mixing, ?S = SAfter

Explanation / Answer

In thermodynamics, a reversible process, or reversible cycle if the process is cyclic, is a process that can be "reversed" by means of infinitesimal changes in some property of the system without entropy production or dissipation of energy.[1] Due to these infinitesimal changes, the system is in thermodynamic equilibrium throughout the entire process. Since it would take an infinite amount of time for the reversible process to finish, perfectly reversible processes are impossible. However, if the system undergoing the changes responds much faster than the applied change, the deviation from reversibility may be negligible. In a reversible cycle, the system and its surroundings will be exactly the same after each cycle.[2] An alternative definition of a reversible process is a process that, after it has taken place, can be reversed and causes no change in either the system or its surroundings. In thermodynamic terms, a process "taking place" would refer to its transition from its initial state to its final state

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.