Question

question 3
what happens to the particles in a liquid when it is heated and turns into a gas?
the particles move faster and spread far apart.
the particles lose energy and clump together.
the particles stop moving completely and freeze in place.
the particles slow down and stay close together.

Explanation:

When a liquid is heated and turns into a gas (a process called vaporization), the particles gain energy. With more energy, they move faster. In a gas, particles are not closely packed like in a liquid; they spread out.

• Option 1: When heated, particles gain kinetic energy (move faster) and in gas state spread apart. This is correct.
• Option 2: Losing energy (particles in gas have more energy than in liquid) and clumping (gas particles are not clumped) is wrong.
• Option 3: Particles in gas are in constant motion (from kinetic - molecular theory of gases), so they don't stop moving. This is wrong.
• Option 4: Slowing down (gain energy when heated so move faster) and staying close (gas particles are far apart) is wrong.

Answer:

The particles move faster and spread far apart.