Chapter 6 - Humidity

Latent heat is released when (P.77):

• Water changes to water vapour

• Ice changes to water

• Water vapour changes to water or ice

• Ice changes to water vapour

Condensation is (P.77):

• change of state from liquid to vapour

• change of state from liquid to solid

• change of state from vapour to liquid

• change of state from solid to liquid

If air is saturated (P.81):

• evaporation will continue until 100% relative humidity

• water will evaporate from the muslin covering the wet bulb

• dry-bulb temperature > wet-bulb temperature

• dry-bulb temperature = wet-bulb temperature

Relative humidity is highest at (P.82):

• 1500HRS

• 2400HRS

• Just after sunset

• Just after sunrise

After 1500hrs (P.82):

• Air temperature starts to increase

• Surface temperature starts to increase

• Relative humidity starts to increase

• Relative humidity starts to decrease

When saturated air is cooled (P.77):

• Clouds or fog will start to form

• Evaporation will occur

• Condensed water will start to freeze

• Water droplets will form ice