
Concept explainers
(a)
The relative humidity.
(a)

Answer to Problem 6E
Explanation of Solution
Given info: The dry-bulb and wet-bulb readings of a psychrometer are
Explanation:
Wet-bulb depression is the difference in the dry-bulb and wet-bulb reading.
The expression for the wet-bulb depression is as follows,
Here,
Substitute
Refer table H.1 in Appendix H provided in the textbook to find the relative humidity.
The relative humidity of the air is
Conclusion:
Therefore, the relative humidity is
(b)
The dew point.
(b)

Answer to Problem 6E
Explanation of Solution
Given info: The dry-bulb and wet-bulb readings of a psychrometer are
Explanation:
Wet-bulb depression is the difference in the dry-bulb and wet-bulb reading.
The expression for the wet-bulb depression is as follows,
Here,
Substitute
Refer table H.2 in Appendix H provided in the textbook to find the dew point.
The dew point is
Conclusion:
The dew point of the air is
(c)
The maximum moisture capacity of the air.
(c)

Answer to Problem 6E
Explanation of Solution
Given info: The dry-bulb and wet-bulb readings of a psychrometer are
Explanation:
Wet-bulb depression is the difference in the dry-bulb and wet-bulb reading.
The expression for the wet-bulb depression is as follows,
Here,
Substitute
Refer table H.1 in Appendix H provided in the textbook to find the maximum moisture capacity of the air.
The maximum moisture capacity of the air is
Conclusion:
The maximum moisture capacity of the air is
(d)
The actual moisture content of the air.
(d)

Answer to Problem 6E
Explanation of Solution
Given info: The dry-bulb and wet-bulb readings of a psychrometer are
Explanation:
The expression for the relative humidity is as follows,
Here,
Rearrange equation (1) to get an expression for the actual moisture content of the air.
Substitute
The actual moisture content of the air is
Conclusion:
The actual moisture content of the air is
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Chapter 19 Solutions
An Introduction to Physical Science
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