CHEMISTRY (CHAPTER 2) Flashcards
(13 cards)
Explain using the particle theory, the changing process from gas to liquid
When gas is cooled, heat energy is released by the particles.
Particles begin to move slower and closer to each other.
The force of attraction between particles becomes stronger.
The particles are attracted closer to one another.
Gas turns into liquid.
What is the name of the process changing from solid to liquid?
MELTING
What is the name of the process changing from liquid to solid?
FREEZING
What is the name of the process changing from liquid to gas?
EVAPORATION
What is the name of the process that changes from gas to liquid?
CONDENSATION
What is the name of the process changing from gas to solid?
DEPOSITION
What is the name of the process changing from solid to gas?
SUBLIMATION
Diffusion in Chinese
扩散
The speed of diffusion depends on three factors, which is:
-Temperature
-Size and mass of the particles
-The states of the substances
Explain how temperature would affect the rate of diffusion.
The higher the temperature, the higher the rate of diffusion
In higher temperature, particles have more energy, so they move faster
Explain how the size and mass would affect the rate of diffusion. (2%)
The larger and heavier particles, the lower the rate of diffusion
Larger and heavier particles diffuse slower than smaller and lighter particles.
Particles move fastest in which state? Explain your answer.
Gas state.
Particles have the largest spaces compare to solid and liquid.
What is the difference between evaporation and boiling?
- Evaporation happens only at the surface of a liquid, while boiling occurs throughout the whole liquid.
- Evaporation can occur at any temperature, but boiling only happens at the boiling point.
- Evaporation happens slowly, whereas boiling happens quickly.
