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Which of the following is correct for critical temperature:
- a)It is the highest temperature at which liquid and vapour can coexist
- b)Beyond this temperature, there is no distinction between the two phases and a gas cannot be liquefied by compression.
- c)At this temperature, the gas and the liquid phases have different critical densities
- d)All are correct
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of the following is correct for critical temperature:a)It is the...
Critical temperature refers to the highest temperature at which liquid and vapor phases can coexist. At this temperature, the distinction between the two phases disappears, and a gas cannot be liquefied by compression.
Explanation:
**Definition of Critical Temperature:**
The critical temperature is defined as the highest temperature at which a substance can exist in both its liquid and vapor phases in equilibrium. Above this temperature, the substance cannot be condensed into a liquid, regardless of the pressure applied.
**Explanation of Option A:**
Option A states that the critical temperature is the highest temperature at which liquid and vapor can coexist. This is correct because at the critical temperature, the substance exists as a single phase that exhibits properties of both a liquid and a gas. It is the temperature at which the liquid and vapor phases become indistinguishable.
**Explanation of Option B:**
Option B states that beyond the critical temperature, there is no distinction between the two phases, and a gas cannot be liquefied by compression. This is also correct because above the critical temperature, the substance exists as a supercritical fluid, which does not exhibit distinct liquid and gas phases. A supercritical fluid cannot be condensed into a liquid phase by increasing the pressure alone.
**Explanation of Option C:**
Option C states that at the critical temperature, the gas and liquid phases have different critical densities. This statement is incorrect because at the critical temperature, the densities of the gas and liquid phases become equal. The critical density refers to the density of a substance at its critical point, where the liquid and vapor phases coexist.
**Conclusion:**
Based on the explanations provided, option A is the correct answer as it accurately describes the critical temperature as the highest temperature at which liquid and vapor can coexist. Option B is also correct as it highlights the fact that beyond the critical temperature, a gas cannot be liquefied by compression. Option C is incorrect as it states that the gas and liquid phases have different critical densities at the critical temperature.
Explanation:
**Definition of Critical Temperature:**
The critical temperature is defined as the highest temperature at which a substance can exist in both its liquid and vapor phases in equilibrium. Above this temperature, the substance cannot be condensed into a liquid, regardless of the pressure applied.
**Explanation of Option A:**
Option A states that the critical temperature is the highest temperature at which liquid and vapor can coexist. This is correct because at the critical temperature, the substance exists as a single phase that exhibits properties of both a liquid and a gas. It is the temperature at which the liquid and vapor phases become indistinguishable.
**Explanation of Option B:**
Option B states that beyond the critical temperature, there is no distinction between the two phases, and a gas cannot be liquefied by compression. This is also correct because above the critical temperature, the substance exists as a supercritical fluid, which does not exhibit distinct liquid and gas phases. A supercritical fluid cannot be condensed into a liquid phase by increasing the pressure alone.
**Explanation of Option C:**
Option C states that at the critical temperature, the gas and liquid phases have different critical densities. This statement is incorrect because at the critical temperature, the densities of the gas and liquid phases become equal. The critical density refers to the density of a substance at its critical point, where the liquid and vapor phases coexist.
**Conclusion:**
Based on the explanations provided, option A is the correct answer as it accurately describes the critical temperature as the highest temperature at which liquid and vapor can coexist. Option B is also correct as it highlights the fact that beyond the critical temperature, a gas cannot be liquefied by compression. Option C is incorrect as it states that the gas and liquid phases have different critical densities at the critical temperature.
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Which of the following is correct for critical temperature:a)It is the highest temperature at which liquid and vapour can coexistb)Beyond this temperature, there is no distinction between the two phases and a gas cannot be liquefied by compression.c)At this temperature, the gas and the liquid phases have different critical densitiesd)All are correctCorrect answer is option 'A'. Can you explain this answer?
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