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Which of the following properties increase(s) during sensible heating of air-water vapour mixture?
1. Relative humidity
2. Humidity ratio
3. Wet bulb temperature
4. Specific enthalpy of air-vapour mixture
Q. Select the correct answer from the codes given below:
1. Relative humidity
2. Humidity ratio
3. Wet bulb temperature
4. Specific enthalpy of air-vapour mixture
Q. Select the correct answer from the codes given below:
- a)1 and 2
- b)3 only
- c)2 and 3
- d)3 and 4
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Which of the following properties increase(s) during sensible heating ...
Effect of sensible heating
1. Dry bulb temperature increases
2. Wet bulb temperature increases
3. Relative humidity decreases
4. Specific enthalpy increases
5. Specific humidity remains constant
1. Dry bulb temperature increases
2. Wet bulb temperature increases
3. Relative humidity decreases
4. Specific enthalpy increases
5. Specific humidity remains constant
Most Upvoted Answer
Which of the following properties increase(s) during sensible heating ...
During the sensible heating of an air-water vapor mixture, several properties change. Let's discuss each property individually:
1. Relative humidity:
During sensible heating, the relative humidity decreases. Relative humidity is the ratio of the partial pressure of water vapor to the saturation pressure at a given temperature. As the air-water vapor mixture is heated, the saturation pressure increases, while the partial pressure of water vapor remains constant. This results in a decrease in relative humidity.
2. Humidity ratio:
The humidity ratio remains constant during sensible heating. The humidity ratio represents the amount of moisture in the air-water vapor mixture. Sensible heating does not add or remove moisture from the mixture, only increases its temperature. Therefore, the humidity ratio remains unchanged.
3. Wet bulb temperature:
The wet bulb temperature increases during sensible heating. Wet bulb temperature is the lowest temperature that can be achieved by evaporating water into the air-water vapor mixture at constant pressure. As the air-water vapor mixture is heated, the wet bulb temperature increases due to increased evaporation and heat transfer from the air to the water.
4. Specific enthalpy of air-vapor mixture:
The specific enthalpy of the air-vapor mixture increases during sensible heating. Specific enthalpy is the amount of energy per unit mass of the mixture. During sensible heating, energy is added to the mixture in the form of heat, which causes an increase in specific enthalpy.
In summary:
- Relative humidity decreases during sensible heating.
- Humidity ratio remains constant.
- Wet bulb temperature increases.
- Specific enthalpy of the air-vapor mixture increases.
Therefore, the correct answer is option D: 3 and 4.
1. Relative humidity:
During sensible heating, the relative humidity decreases. Relative humidity is the ratio of the partial pressure of water vapor to the saturation pressure at a given temperature. As the air-water vapor mixture is heated, the saturation pressure increases, while the partial pressure of water vapor remains constant. This results in a decrease in relative humidity.
2. Humidity ratio:
The humidity ratio remains constant during sensible heating. The humidity ratio represents the amount of moisture in the air-water vapor mixture. Sensible heating does not add or remove moisture from the mixture, only increases its temperature. Therefore, the humidity ratio remains unchanged.
3. Wet bulb temperature:
The wet bulb temperature increases during sensible heating. Wet bulb temperature is the lowest temperature that can be achieved by evaporating water into the air-water vapor mixture at constant pressure. As the air-water vapor mixture is heated, the wet bulb temperature increases due to increased evaporation and heat transfer from the air to the water.
4. Specific enthalpy of air-vapor mixture:
The specific enthalpy of the air-vapor mixture increases during sensible heating. Specific enthalpy is the amount of energy per unit mass of the mixture. During sensible heating, energy is added to the mixture in the form of heat, which causes an increase in specific enthalpy.
In summary:
- Relative humidity decreases during sensible heating.
- Humidity ratio remains constant.
- Wet bulb temperature increases.
- Specific enthalpy of the air-vapor mixture increases.
Therefore, the correct answer is option D: 3 and 4.
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Which of the following properties increase(s) during sensible heating of air-water vapour mixture?1. Relative humidity2. Humidity ratio3. Wet bulb temperature4. Specific enthalpy of air-vapour mixtureQ.Select the correct answer from the codes given below:a)1 and 2b)3 onlyc)2 and 3d)3 and 4Correct answer is option 'D'. Can you explain this answer?
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