Why Does Water Evaporate at Room Temperature?

The video explains the processes of boiling and evaporation, focusing on the properties of water molecules and the bonds between them. It describes how water molecules are held together by covalent bonds and interact through hydrogen bonds. Boiling occurs when water reaches 100°C, allowing molecules to break hydrogen bonds and vaporize. Evaporation happens at lower temperatures due to the random energy distribution among molecules, with some gaining enough energy to escape as vapor. Factors like temperature, humidity, and wind affect evaporation rates.

What is the boiling point of water?

• 100°C

• 200°C

• 50°C

• 150°C

What type of bond holds the atoms within a water molecule together?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Which type of bond is responsible for water's high boiling point?

• Ionic bond

• Covalent bond

• Van der Waals bond

• Hydrogen bond

Why can water evaporate at temperatures below its boiling point?

• Water molecules do not move

• Some water molecules have higher energy

• Water molecules are heavier at lower temperatures

• All water molecules have the same energy

Which factor does NOT affect the rate of evaporation?

• Temperature

• Humidity

• Wind

• Color of the water