What is absolute humidity?

What is absolute humidity?

• A. Relative humidity
• B. The actual amount of water vapor in a mixture of air and water
• C. The dew point temperature
• D. The water-holding capacity of air at a given temperature

Answer: (B)

Absolute humidity is the actual amount of water vapor present in a given volume of air. It describes how much moisture is in the air, typically expressed as grams of water per cubic meter. This is different from relative humidity, which compares the current vapor content to what the air could hold at the current temperature; it’s also different from the dew point, the temperature at which air would become saturated and condensation would begin; and from the air’s water-holding capacity at a given temperature, which is the maximum amount of water vapor the air can hold at that temperature. Since absolute humidity directly measures the actual water vapor in the air, it best matches the definition.

Absolute humidity is the actual amount of water vapor present in a given volume of air. It describes how much moisture is in the air, typically expressed as grams of water per cubic meter. This is different from relative humidity, which compares the current vapor content to what the air could hold at the current temperature; it’s also different from the dew point, the temperature at which air would become saturated and condensation would begin; and from the air’s water-holding capacity at a given temperature, which is the maximum amount of water vapor the air can hold at that temperature. Since absolute humidity directly measures the actual water vapor in the air, it best matches the definition.