Calculating Water Condensation in Air

What is the process to calculate the amount of water that condenses out of each cubic meter of air?

Given a temperature drop from 25.0°C to 15.0°C and a relative humidity of 90.0%, how can we determine the grams of water that condense out of the air?

Answer:

To calculate the grams of water that condense out of each cubic meter of air when the temperature drops, you need to find the difference in saturation density of water vapor between the two temperatures.

When determining the grams of water that will condense out of each cubic meter of air, we must first understand the concept of saturation density of water vapor. This value refers to the maximum amount of water vapor that can exist in the air at a specific temperature and pressure before condensation occurs.

For this specific scenario, we are given a temperature drop from 25.0°C to 15.0°C and a relative humidity of 90.0%. The process involves calculating the saturation density of water vapor at both temperatures and then finding the difference between them.

Let's assume the saturation density at 25°C is 10 g/m³ and at 15°C is 8 g/m³. By subtracting these values (10 g/m³ - 8 g/m³), we find that 2 grams of water must condense out of each cubic meter of air when the temperature decreases from 25.0°C to 15.0°C.