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Physics: Principles with Applications | 6th Edition | ISBN: 9780321569837 | Authors: Douglas C. Giancoli
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Calculate the total water vapor pressure in the air on the following two days: (a) a hot

Chapter 13, Problem 95GP

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QUESTION:

Problem 95GP

Calculate the total water vapor pressure in the air on the following two days: (a) a hot summer day, with the temperature 30°C and the relative humidity at 40%; (b) a cold winter day, with the temperature 5°C and the relative humidity at 80%.

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QUESTION:

Problem 95GP

Calculate the total water vapor pressure in the air on the following two days: (a) a hot summer day, with the temperature 30°C and the relative humidity at 40%; (b) a cold winter day, with the temperature 5°C and the relative humidity at 80%.

ANSWER:

Solution 95GP

Part (a)

Step 1 of 2:

Our aim is to find the total water vapor pressure (partial pressure P) in the air during the hot summer day.

The temperature T = 30°C

The saturated vapor pressure corresponding to the temperature Psat = 4.24 x 103 Pa

The relative humidity RH = 40% = 0.4

The relative humidity is expressed as follows

Solving for P

Putting the values

The total water vapor pressure in the air is 1.7 x 103 Pa.

Part (b)

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