Chemistry Exam > Chemistry Questions > Select correct statement:a)We can condense va...
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Select correct statement:
- a)We can condense vapour simply by applying pressure
- b)To liquefy a gas one must lower the temperature below TC and also apply pressure
- c)At TC, there is no distinction between, liquid and vapour state hence density of the liquid is nearly equal to density of the vapour
- d)However great the pressure applied, a gas cannot be liquefied below it’s critical temperature.
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Select correct statement:a)We can condense vapour simply by applying p...
Statement:
However great the pressure applied, a gas cannot be liquefied below its critical temperature.
Explanation:
Introduction:
In thermodynamics, the critical temperature (TC) is the highest temperature at which a substance can exist as a liquid. Above this temperature, the substance will exist only as a gas, regardless of the pressure applied.
Gas-Liquid Equilibrium:
When a substance exists in both the gaseous and liquid state, it is said to be in a state of equilibrium. At equilibrium, there is a balance between the rate of condensation (liquid to gas) and the rate of vaporization (gas to liquid). The temperature at which this equilibrium occurs is known as the boiling point of the substance.
Effect of Pressure and Temperature on Liquification:
- To liquefy a gas, both temperature and pressure must be manipulated. Generally, increasing the pressure on a gas increases the likelihood of its molecules coming together and forming a liquid.
- Lowering the temperature of a gas reduces the kinetic energy of its molecules, making them move slower and come closer together. This also increases the chance of liquefaction.
- However, there is a limit to how much pressure can be applied to liquefy a gas. This limit is known as the critical pressure (PC).
- Similarly, there is a limit to how low the temperature can be lowered to liquefy a gas. This limit is known as the critical temperature (TC).
Critical Temperature and Pressure:
- The critical temperature is the temperature above which a substance cannot exist in the liquid state, regardless of the pressure applied. At temperatures above TC, the substance will only exist as a gas.
- The critical pressure is the pressure required to liquefy a substance at its critical temperature. It represents the maximum pressure at which a gas can be liquefied.
Explanation of the Correct Statement:
- The correct statement is option 'D' - However great the pressure applied, a gas cannot be liquefied below its critical temperature.
- This means that no matter how high the pressure is, a gas cannot be forced to liquefy if its temperature is above the critical temperature.
- The critical temperature represents a threshold beyond which the gas molecules have too much kinetic energy to condense into a liquid state, regardless of the pressure applied.
- The behavior of gases near their critical temperature is unique because the distinction between the liquid and vapor phases becomes less clear. The density of the liquid and vapor phases becomes nearly equal, and the substance exhibits properties of both phases simultaneously.
- It is important to note that the critical temperature and pressure values are specific to each substance and can vary widely.
Conclusion:
In summary, the statement "However great the pressure applied, a gas cannot be liquefied below its critical temperature" is correct. The critical temperature represents the highest temperature at which a substance can exist as a liquid, and above this temperature, the substance will only exist as a gas, regardless of the pressure applied.
However great the pressure applied, a gas cannot be liquefied below its critical temperature.
Explanation:
Introduction:
In thermodynamics, the critical temperature (TC) is the highest temperature at which a substance can exist as a liquid. Above this temperature, the substance will exist only as a gas, regardless of the pressure applied.
Gas-Liquid Equilibrium:
When a substance exists in both the gaseous and liquid state, it is said to be in a state of equilibrium. At equilibrium, there is a balance between the rate of condensation (liquid to gas) and the rate of vaporization (gas to liquid). The temperature at which this equilibrium occurs is known as the boiling point of the substance.
Effect of Pressure and Temperature on Liquification:
- To liquefy a gas, both temperature and pressure must be manipulated. Generally, increasing the pressure on a gas increases the likelihood of its molecules coming together and forming a liquid.
- Lowering the temperature of a gas reduces the kinetic energy of its molecules, making them move slower and come closer together. This also increases the chance of liquefaction.
- However, there is a limit to how much pressure can be applied to liquefy a gas. This limit is known as the critical pressure (PC).
- Similarly, there is a limit to how low the temperature can be lowered to liquefy a gas. This limit is known as the critical temperature (TC).
Critical Temperature and Pressure:
- The critical temperature is the temperature above which a substance cannot exist in the liquid state, regardless of the pressure applied. At temperatures above TC, the substance will only exist as a gas.
- The critical pressure is the pressure required to liquefy a substance at its critical temperature. It represents the maximum pressure at which a gas can be liquefied.
Explanation of the Correct Statement:
- The correct statement is option 'D' - However great the pressure applied, a gas cannot be liquefied below its critical temperature.
- This means that no matter how high the pressure is, a gas cannot be forced to liquefy if its temperature is above the critical temperature.
- The critical temperature represents a threshold beyond which the gas molecules have too much kinetic energy to condense into a liquid state, regardless of the pressure applied.
- The behavior of gases near their critical temperature is unique because the distinction between the liquid and vapor phases becomes less clear. The density of the liquid and vapor phases becomes nearly equal, and the substance exhibits properties of both phases simultaneously.
- It is important to note that the critical temperature and pressure values are specific to each substance and can vary widely.
Conclusion:
In summary, the statement "However great the pressure applied, a gas cannot be liquefied below its critical temperature" is correct. The critical temperature represents the highest temperature at which a substance can exist as a liquid, and above this temperature, the substance will only exist as a gas, regardless of the pressure applied.
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Select correct statement:a)We can condense vapour simply by applying pressureb)To liquefy a gas one must lower the temperature below TC and also apply pressurec)At TC, there is no distinction between, liquid and vapour state hence density of the liquid is nearly equal to density of the vapourd)However great the pressure applied, a gas cannot be liquefied below its critical temperature.Correct answer is option 'D'. Can you explain this answer?
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Select correct statement:a)We can condense vapour simply by applying pressureb)To liquefy a gas one must lower the temperature below TC and also apply pressurec)At TC, there is no distinction between, liquid and vapour state hence density of the liquid is nearly equal to density of the vapourd)However great the pressure applied, a gas cannot be liquefied below its critical temperature.Correct answer is option 'D'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Select correct statement:a)We can condense vapour simply by applying pressureb)To liquefy a gas one must lower the temperature below TC and also apply pressurec)At TC, there is no distinction between, liquid and vapour state hence density of the liquid is nearly equal to density of the vapourd)However great the pressure applied, a gas cannot be liquefied below its critical temperature.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select correct statement:a)We can condense vapour simply by applying pressureb)To liquefy a gas one must lower the temperature below TC and also apply pressurec)At TC, there is no distinction between, liquid and vapour state hence density of the liquid is nearly equal to density of the vapourd)However great the pressure applied, a gas cannot be liquefied below its critical temperature.Correct answer is option 'D'. Can you explain this answer?.
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