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How does temperature affect vapour pressure?
- a)Vapour pressure decreases with increasing temperature.
- b)Vapour pressure is independent of temperature.
- c)Vapour pressure increases with increasing temperature.
- d)Temperature has no impact on vapour pressure.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
How does temperature affect vapour pressure?a)Vapour pressure decrease...
Temperature has an exponential relationship with vapour pressure. As the temperature increases, the kinetic energy of liquid molecules increases, leading to higher vapour pressure. Vapour pressure and temperature are directly proportional.
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How does temperature affect vapour pressure?a)Vapour pressure decrease...
Understanding Vapor Pressure
Vapor pressure is defined as the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature.
Impact of Temperature on Vapor Pressure
- As temperature increases, the kinetic energy of the molecules in a liquid also increases.
- High-energy molecules are more likely to escape the liquid phase and enter the vapor phase.
Why Vapor Pressure Increases with Temperature
- At higher temperatures, more molecules have enough energy to overcome intermolecular forces that keep them in the liquid state.
- This leads to an increase in the number of molecules in the vapor phase, thus raising the vapor pressure.
Key Points to Remember
- The relationship between temperature and vapor pressure is typically represented by the Clausius-Clapeyron equation.
- This equation illustrates how the vapor pressure of a substance changes with temperature, confirming that vapor pressure is directly proportional to temperature.
Conclusion
In summary, option 'C' is correct: vapor pressure increases with increasing temperature. Understanding this principle is crucial for various applications in chemistry and related fields, including understanding phase changes and designing processes in chemical engineering.
Vapor pressure is defined as the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature.
Impact of Temperature on Vapor Pressure
- As temperature increases, the kinetic energy of the molecules in a liquid also increases.
- High-energy molecules are more likely to escape the liquid phase and enter the vapor phase.
Why Vapor Pressure Increases with Temperature
- At higher temperatures, more molecules have enough energy to overcome intermolecular forces that keep them in the liquid state.
- This leads to an increase in the number of molecules in the vapor phase, thus raising the vapor pressure.
Key Points to Remember
- The relationship between temperature and vapor pressure is typically represented by the Clausius-Clapeyron equation.
- This equation illustrates how the vapor pressure of a substance changes with temperature, confirming that vapor pressure is directly proportional to temperature.
Conclusion
In summary, option 'C' is correct: vapor pressure increases with increasing temperature. Understanding this principle is crucial for various applications in chemistry and related fields, including understanding phase changes and designing processes in chemical engineering.
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