3 States of H2O

The video explains the states of matter on Earth, focusing on the behavior of H2O. It describes how H2O transitions from solid (ice) to liquid (water) and then to gas (vapor) as thermal energy is added. The process involves weakening the forces of attraction between molecules at specific temperatures, illustrating the changes in kinetic energy and state transitions.

What is the state of dihydrogen monoxide (H2O) at atmospheric pressure and below 0 degrees Celsius?

• Liquid

• Plasma

• Gas

• Solid

What happens to the H2O molecules when thermal energy is added and the temperature reaches 0 degrees Celsius?

• They remain in the solid state.

• They become more tightly packed.

• The forces of attraction between them strengthen.

• They transition from solid to liquid.

At what temperature does liquid water transition to water vapor?

• 50 degrees Celsius

• 200 degrees Celsius

• 0 degrees Celsius

• 100 degrees Celsius

What is the effect of thermal energy on the forces of attraction between H2O molecules at 100 degrees Celsius?

• The forces of attraction become stronger.

• The forces of attraction disappear completely.

• The forces of attraction weaken.

• The forces of attraction remain unchanged.

Which process describes the transition from liquid water to water vapor?

• Freezing

• Sublimation

• Condensation

• Evaporation