Given the change of phase: CO 2(g) changes to CO 2(s) , the entropy of
Given the change of phase: CO2(g) changes to CO2(s), the entropy of the system
- A) decreases
- B) increases
- C) remains the same
- D) all of the above
Correct Answer: A) decreases
Explanation
When a substance changes phase, its entropy (the measure of disorder or randomness in a system) also changes. In the given phase change, CO\(_2\) is changing from gas (g) to solid (s). In general, the entropy of a substance in the gas phase is higher than that of the same substance in the solid phase because gas particles are more disordered and have more freedom to move around compared to solid particles.
As CO\(_2\) changes from the gas phase to the solid phase, the particles become more ordered and have less freedom of movement. This results in a decrease in the entropy of the system. Therefore, the correct answer isOption A: decreases.
It is essential to understand that entropy is a key concept in thermodynamics, and phase changes play a significant role in determining the entropy of a system. In general, as a substance goes from solid to liquid to gas, its entropy increases. Conversely, as a substance goes from gas to liquid to solid, its entropy decreases.