سوال ۲۱ کنکور ارشد فیزیک ۱۴۰۵ — Read the following excerpt from the passage (on…

Question

Read the following excerpt from the passage (on reversible/irreversible processes and entropy) and answer the question.

Paragraph 1 first explains reversibility using the example of ice melting, and then continues: "Similarly, compressed gas confined in a cylinder could either expand freely into the atmosphere if a valve were opened (an irreversible process), or it could do useful work by pushing a moveable piston against the force needed to confine the gas. The latter process is reversible because only a slight increase in the restraining force could reverse the direction of the process from expansion to compression."

Why does the writer mention cylinder in paragraph 1?

Accepted Answer

To further explain a point mentioned earlier with reference to another form of matter

Answer

To illustrate that the point mentioned earlier is not necessarily true in all forms of matter

Answer

To demonstrate how irreversible processes may sometimes change into reversible ones

Answer

To indicate that entropy, in both of its variations, takes place in all forms of solid materials