topic 3 particle model Flashcards
What is density?
Density is the mass per unit volume of a substance.
What happens to density if the mass increases but volume stays the same?
Density increases.
What are the three states of matter?
Solid, liquid, gas.
How do particles behave in a solid?
Particles are tightly packed, vibrate in fixed positions, and have a fixed shape and volume.
How do particles behave in a liquid?
Particles are close together but can move past each other, taking the shape of the container.
How do particles behave in a gas?
Particles are far apart, move freely, and fill the container.
What is specific latent heat?
The energy needed to change the state of 1 kg of a substance without changing its temperature.
What happens to energy during melting or boiling?
Energy is absorbed to break bonds between particles.
What happens to energy during freezing or condensation?
Energy is released as bonds form between particles.
What causes gas pressure?
Gas particles colliding with the walls of the container.
How does increasing temperature affect gas pressure?
Increasing temperature increases gas pressure because particles move faster and collide more frequently.
What is the relationship between pressure and volume at constant temperature?
Pressure is inversely proportional to volume.
