Class 11 Exam > Class 11 Questions > For liquid⇌vapour equilibrium, at a giv...
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For liquid ⇌vapour equilibrium, at a given temperature, the constant is
- a)mass of a gas
- b)solubility
- c)vapour pressure
- d)mass of a solvent
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
For liquid⇌vapour equilibrium, at a given temperature, the const...
vapour pressure at the given temperature is constant.
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For liquid⇌vapour equilibrium, at a given temperature, the const...
Explanation:
Equilibrium in Liquid-Vapor System:
- In a liquid-vapor system, equilibrium is established between the liquid phase and the vapor phase.
- This equilibrium is governed by the relationship between the liquid phase and the vapor phase at a given temperature.
Constant for Liquid-Vapor Equilibrium:
- The constant that is associated with liquid-vapor equilibrium at a given temperature is the vapor pressure.
- Vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system.
Significance of Vapor Pressure:
- Vapor pressure is a measure of a substance's tendency to vaporize.
- It represents the pressure exerted by the vapor when the liquid and vapor are in equilibrium.
- At equilibrium, the rate of condensation of vapor molecules to the liquid phase is equal to the rate of evaporation of liquid molecules to the vapor phase.
Relation to Temperature:
- Vapor pressure is dependent on temperature.
- As the temperature increases, the vapor pressure also increases due to higher kinetic energy of molecules in the liquid phase leading to more molecules escaping into the vapor phase.
Conclusion:
- In conclusion, the constant associated with liquid-vapor equilibrium at a given temperature is the vapor pressure. It plays a crucial role in determining the equilibrium between the liquid and vapor phases in a system.
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For liquid⇌vapour equilibrium, at a given temperature, the constant isa)mass of a gasb)solubilityc)vapour pressured)mass of a solventCorrect answer is option 'C'. Can you explain this answer?
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