Question

The temperature, pressure, and relative humidity of an air parcel are 20C, 990 hPa, and 50% respectively

What is its saturation H₂O pressure?

Answer 1

The saturation H2O pressure can be calculated using the relative humidity and the vapor pressure of water at a given temperature. At 20°C with a 50% relative humidity, the saturation H2O pressure is approximately 1.165×10³ Pa.

Step-by-step explanation:

The saturation vapor density of water at a specific temperature is the maximum amount of water vapor that air can hold at that temperature.

The saturation H2O pressure can be determined using the relative humidity and the partial pressure of water vapor in the air parcel.

In this case, the relative humidity is given as 50%, so the air parcel is holding 50% of the maximum amount of water vapor it can hold at 20°C.

To calculate the saturation H2O pressure, you need to know the vapor pressure of water at 20°C. The vapor pressure of water at 20°C is approximately 2.33×10³ Pa.

So, the saturation H2O pressure can be calculated as 50% of the vapor pressure of water, which is

0.5 × 2.33×10³ Pa = 1.165×10³ Pa.