Condensation – Vapour Becomes Water

📚 Key Concepts

🔹 What is Condensation?

Condensation is the process of conversion of water vapour into its liquid state.

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Process:

  • Water vapour in air touches cold surface
  • Vapour loses energy and becomes liquid droplets
  • Happens when vapour cools down

🔹 Where Do We See Condensation?

Common Examples:

  • Water droplets on cold glass containing ice water
  • Dew drops on plants in morning
  • Water droplets on bathroom mirror after hot shower
  • Droplets on inner side of pot lid while cooking
  • Clouds forming in sky

🔹 Understanding the Cold Glass Experiment

Observation: Water droplets appear on outer surface of cold glass

Explanation:

  • Water vapour in air comes in contact with cold glass
  • Vapour condenses to form tiny water droplets
  • Mass of glass increases due to condensed water
  • Water doesn’t seep through glass – it comes from air

Humidity:

  • Amount of water vapour in air is called humidity
  • Higher humidity = More condensation
  • Lower humidity = Less condensation
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