An ideal gas expands into a vacuum in a rigid vessel.As a result there is:
A)a change in entropy
B)an increase of pressure
C)a change in temperature
D)a decrease of internal energy
E)a change in phase

Question

Quizplus · Accepted Answer

When an ideal gas expands into a vacuum in a rigid vessel, there is a change in entropy. This is because the gas is spreading out to fill the available volume, which results in an increase in the number of possible microstates. As entropy is a measure of the number of possible microstates, this means that the entropy of the system has increased. The other options are not relevant in this scenario, as the vessel is rigid (so pressure cannot increase), there is no heat transfer (so temperature does not change), there is no interaction with other substances (so phase does not change), and internal energy remains constant.

An Ideal Gas Expands into a Vacuum in a Rigid