Chapter 15, Problem 15.26P

Interpretation Introduction

Interpretation:

The vapor pressure of water in greenhouse gas has to be identified.

Concept Introduction:

The vapor pressure in atmosphere is measured as relative humidity. It is a ratio of partial vapor pressure of water to the vapor pressure at equilibrium for water at same temperature in atmosphere.

It is formulated as follows:

  $\text{Relative}\text{humidity}=\left(\frac{P_{{\text{H}}_{\text{2}}\text{O}}}{P{°}_{{\text{H}}_{\text{2}}\text{O}}}\right)\times 100$

Here,

$P{°}_{{\text{H}}_{\text{2}}\text{O}}$ is vapor pressure at equilibrium for water.

$P_{{\text{H}}_{\text{2}}\text{O}}$ is partial pressure of water.

The temperature at with relative humidity is $100\%$ is dew point.