particle model of matter

• What are the subtopics covered in the video?

  • Particle model
  • Properties of solids, liquids, gases
  • Density
  • Internal energy
  • Specific latent heat
  • Particle motion in gases
• What is the structure of particles in solids?

  Fixed regular structure with strong attraction
• How do particles in solids transfer energy?

  By vibrating and passing energy along
• What is the particle density in solids?

  High particle density
• How do particles in liquids differ from those in solids?

  Weaker attraction and irregular structure
• What is the typical energy level of particles in liquids?

  More energy than in solids
• How does the density of liquids compare to solids?

  Less dense than solids
• What is the force of attraction between gas particles?

  Almost no force of attraction
• How do gas particles move?

  Randomly in any direction
• What is the density of gases compared to solids and liquids?

  Very low density
• What is the equation for density?

  Density = mass / volume
• What are the units for density?

  kg per m³
• How do you find the density of regular objects?

  Mass divided by volume
• How do you calculate the volume of a cube?

  Width times height times depth
• How do you find the density of irregular objects?

  1. Fill a Eureka can with water.
  2. Submerge the object fully.
  3. Measure the displaced water volume.
  4. Use density equation: Density = mass / volume.
• What is internal energy?

  Total energy in a system's particles
• How does heating a system affect internal energy?

  Increases kinetic energy and internal energy
• What happens if internal energy increases enough?

  It results in a change of state
• What is specific latent heat?

  Energy needed to change state of substance
• What does the graph of temperature versus time show during a change of state?

  Temperature increase stops while breaking bonds
• What is the equation for specific latent heat?

  Energy = mass times specific latent heat
• What are the units for specific latent heat?

  Joules per kilogram
• How do you rearrange the specific latent heat equation?

  Specific latent heat = energy / mass
• What is gas pressure?

  Force exerted per unit area
• How does the number of particles affect gas pressure?

  More particles increase pressure in smaller space
• How does gas pressure change when the volume decreases?

  Pressure increases as volume decreases
• What is the overall summary of the particle model of matter?

  • Describes properties of solids, liquids, gases
  • Explains density and internal energy
  • Discusses specific latent heat and gas pressure