2 - Particles

• What is the latent heat of fusion?

  Energy for liquid to solid and vice versa
• What is latent heat?

  Energy needed to change state
• What is the unit for latent heat?

  J/kg
• What is the latent heat of vaporization?

  Energy for liquid to gas and vice versa
• What does density measure?

  How compact the matter is
• How is density calculated?

  Density = mass ÷ volume
• What happens to density as matter changes from solid to gas?

  Density decreases
• Why does density decrease when changing states?

  More gaps between particles form
• What is the density of objects that float?

  Usually less than one
• What is the relationship between milliliters and cubic centimeters?

  1 ml = 1 cm³
• How do you find the density of irregular solids?

  • Use a balance to find mass
  • Use displacement to find volume
• How do you measure the density of a liquid?

  Mass difference of empty and filled cylinder
• How do you find the density of a gas?

  • Trap gas in a flask for volume
  • Measure mass difference of full and empty flask
• What equipment is used to remove gas for density measurement?

  A vacuum pump