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Which of the following statements are correct?
- a)It is not possible to compress a gas at a temperature below TC
- b)At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occurs
- c)No condensation takes place above TC
- d)Due to higher kinetic energy of the gas molecules above TC, it is considered as super critical fluid
Correct answer is option 'B'. Can you explain this answer?
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Which of the following statements are correct?a)It is not possible to ...
**Explanation:**
The correct statement is **b) At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occurs**.
Let's break down the explanation into bullet points:
1. **Condensation and temperature:** Condensation is the process by which a gas changes into a liquid. It occurs when the temperature of a gas is reduced below its critical temperature (TC).
2. **Critical temperature (TC):** The critical temperature is the highest temperature at which a substance can exist in the liquid state. Above this temperature, the substance will always be in the gas state, regardless of the pressure applied.
3. **Kinetic energy and temperature:** The kinetic energy of gas molecules is directly related to temperature. As the temperature increases, the kinetic energy of the molecules also increases.
4. **Gas compression and temperature:** The compressibility of a gas decreases as the temperature decreases. At lower temperatures, the gas molecules are closer together, and the attractive forces between them become significant.
5. **Attractive forces and condensation:** At temperatures below TC, the molecules are close enough for the attractive forces to act. These attractive forces overcome the kinetic energy of the gas molecules, leading to the formation of intermolecular bonds and the transition from gas to liquid phase (condensation).
6. **No condensation above TC:** Above the critical temperature, the gas molecules have enough kinetic energy to overcome the attractive forces between them. As a result, they remain in the gas phase, and no condensation occurs.
7. **Supercritical fluid:** A supercritical fluid is a substance that is above its critical temperature and critical pressure. It exhibits properties of both liquids and gases since it is at a temperature and pressure where the distinction between the two phases is blurred. The statement d) is incorrect because a gas above TC is not considered a supercritical fluid.
Therefore, the correct statement is b) **At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occurs**.
The correct statement is **b) At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occurs**.
Let's break down the explanation into bullet points:
1. **Condensation and temperature:** Condensation is the process by which a gas changes into a liquid. It occurs when the temperature of a gas is reduced below its critical temperature (TC).
2. **Critical temperature (TC):** The critical temperature is the highest temperature at which a substance can exist in the liquid state. Above this temperature, the substance will always be in the gas state, regardless of the pressure applied.
3. **Kinetic energy and temperature:** The kinetic energy of gas molecules is directly related to temperature. As the temperature increases, the kinetic energy of the molecules also increases.
4. **Gas compression and temperature:** The compressibility of a gas decreases as the temperature decreases. At lower temperatures, the gas molecules are closer together, and the attractive forces between them become significant.
5. **Attractive forces and condensation:** At temperatures below TC, the molecules are close enough for the attractive forces to act. These attractive forces overcome the kinetic energy of the gas molecules, leading to the formation of intermolecular bonds and the transition from gas to liquid phase (condensation).
6. **No condensation above TC:** Above the critical temperature, the gas molecules have enough kinetic energy to overcome the attractive forces between them. As a result, they remain in the gas phase, and no condensation occurs.
7. **Supercritical fluid:** A supercritical fluid is a substance that is above its critical temperature and critical pressure. It exhibits properties of both liquids and gases since it is at a temperature and pressure where the distinction between the two phases is blurred. The statement d) is incorrect because a gas above TC is not considered a supercritical fluid.
Therefore, the correct statement is b) **At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occurs**.
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Which of the following statements are correct?a)It is not possible to compress a gas at a temperature below TCb)At a temperature below TC, the molecules are close enough for the attractive forces to act, and condensation occursc)No condensation takes place above TCd)Due to higher kinetic energy of the gas molecules above TC, it is considered as super critical fluidCorrect answer is option 'B'. Can you explain this answer?
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