A flask containing helium gas is released into a closed room.Which of the following ideas concerning entropy is/are true?
A) ΔS(system) 0
B) Matter is dispersed.
C) ΔS(universe) 0
D) This process is spontaneous.
E) All of these statements are true.

Question

A flask containing helium gas is released into a closed room.Which of the following ideas concerning entropy is/are true?
A) ΔS(system)> 0
B) Matter is dispersed.
C) ΔS(universe)> 0
D) This process is spontaneous.
E) All of these statements are true.

Quizplus · Accepted Answer

A) ΔS(system)> 0: As the gas expands into the room, the number of microstates available to the gas molecules increases, leading to an increase in entropy. Therefore ΔS(system)> 0.
B) Matter is dispersed: Since the gas in the flask is released into the room, it spreads out, making matter more dispersed.
C) ΔS(universe)> 0: The entropy change of the system and its surroundings is always positive for an irreversible process. In this case, the system is the helium gas and the surroundings are the rest of the room. Therefore, ΔS(universe)> 0.
D) This process is spontaneous: This process occurs spontaneously without any external intervention, so it is spontaneous.
Therefore, all of these statements are true.

A Flask Containing Helium Gas Is Released into a Closed