Key terms

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River

Cards (18)

  • Change in thermal energy
    The product of the mass, specific heat capacity, and temperature change of an object.
  • Chemical Changes
    Changes to the chemical structure of a substance. The substance doesn't usually restore its original properties when the changes are reversed.
  • Condensation
    The change from a gaseous (vapour) state to a liquid state; the cooling of an object.
  • Density
    The mass per unit volume of an object.
  • Evaporation
    The change from a liquid state to a gaseous (vapour) state; a substance is heated.
  • Freezing
    The changing from a liquid state to a solid state; a substance is cooled.
  • Gas temperature
    The temperature of gas is directly proportional to the average kinetic energy of it's molecules.
  • Internal energy
    The energy stored by the atoms and molecules that make up a system. It is equal to the sum of the total kinetic and potential energies of the particles in the system.
  • Latent heat
    The energy required for a substance to change state.
  • Melting
    The changing from a solid state to a liquid state; a substance is heated.
  • Pascals
    The unit of pressure, equal to a force of 1 newton acting perpendicular to an area of 1 metre squared.
  • Physical Changes
    Changes to the physical properties of a substance which can be reversed. Changes of states are physical changes since substances can restore their original properties when the changes are reversed.
  • Pressure
    The force acting perpendicular to a substance, per unit area.
  • Specific Heat Capacity
    The amount of energy required to raise 1Kg of a substance by 1 degree Celsius.
  • Specific Latent Heat of Fusion
    The amount of energy needed to change 1Kg of a substance from a solid state to a liquid state, whilst held at a constant temperature.
  • Specific Latent Heat of Vaporization
    The amount of energy needed to change 1Kg of a substance from a liquid state to a gaseous state whilst being held at a constant temperature.
  • Specific Latent Heat
    The amount of energy needed to change the state of 1Kg of a substance whilst being held at a constant temperature.
  • Sublimation
    The direct changing of state from a solid to a gas state, without passing through the liquid state phase.