Chapter 19, Problem 10E

### An Introduction to Physical Science

14th Edition
James Shipman + 3 others
ISBN: 9781305079137

Chapter
Section

### An Introduction to Physical Science

14th Edition
James Shipman + 3 others
ISBN: 9781305079137
Textbook Problem

# On a day when the air temperature is 80°F, the relative humidity is measured to be 79%. How many degrees would the air temperature have to be lowered for the relative humidity to be 100%?

To determine
The change in the air temperature to make relative humidity 100% .

Explanation

Given info: The air temperature is 80Â Â°F . The measured relative humidity is 79% .

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,

Î”T is the wet-bulb depression

Refer table H.1 in Appendix H provided in the textbook to find the relative humidity.

When the DryÂ bulbÂ reading is 80Â Â°F and the relative humidity is 79% , the wet-bulb depression is 5Â Â°F .

Substitute 5Â Â°F for Î”T and 80Â Â°F for DryÂ bulbÂ reading

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