Changes of State and Particle Model

Cards (20)

  • What is the definition of density?
    The mass per unit volume of a material
  • What is the equation for density?
    = m/v
  • What are the units for density?
    kg/m³
  • What is the least dense state of matter?
    Gas
  • What is the order of states of matter from least to most dense?
    Gas, Liquid, Solid
  • How are particles arranged in a solid?
    Tightly packed in a regular arrangement
  • What can particles in a solid do?
    Vibrate on the spot
  • How are particles arranged in a liquid?
    Close together, but irregularly arranged
  • What can particles in a liquid do?
    Flow over each other
  • How are particles arranged in a gas?
    Separated with no regular arrangement
  • What can particles in a gas do?
    Move freely
  • What is always conserved during a change of state?
    Mass
  • How does a change of state differ from a chemical change?
    Material can return to previous properties
  • What is sublimation?
    Solid changes into gas without liquid
  • What is evaporation?
    Liquid changes into gas state
  • What is the opposite of evaporation?
    Condensation
  • What happens when water boils in an open pan?
    Some water evaporates, decreasing mass
  • Why does the mass of the pan decrease when water boils?
    Water evaporates and turns into vapour
  • What processes occur when a bathroom mirror mists up?
    Water vapour condenses on the cooler mirror
  • What are the steps involved when a bathroom mirror mists up?
    • Hot water evaporates to form vapour
    • Vapour lands on the cooler mirror
    • Vapour condenses to liquid on the mirror