Question

12. Water at 25°C is heated and changed to gas at 100°C. What happened to the water molecules? It ___ A. stop moving B. move farther apartC. move more slowly D. move closer together

Answer 1

Answer:

B. move farther apart

Step-by-step explanation:

Note that:

• The higher the temperature of a substance, the higher the kinetic energy possessed by its molecules

,

• The higher the kinetic energy possessed by the molecules, the higher their speed of motion

,

• The molecules of a gas have higher kinetic energy, hence they collide with each other and with the wall of the container.

When water is heated from 25°C to a gas at 100°C, the molecules posses higher kinetic energy(due to increase in temperature). Therefore, they move farther apart.