Transfer of thermal energy

2.2.4 Melting and boiling

3.1 General wave properties

Transfer of thermal energy

  1. Conduction

    1. Good and bad conductors of heat can be determined by the speed at which heat is transferred through it
    2. Heat is transferred when hotter, and therefore faster-moving, molecules collide with cooler & slower molecules and transfers some of its energy to it

  2. Convection

    1. Convection in a fluid occurs since hotter fluid is less dense and rises, causing colder fluid to sink, creating a circulation of heat transfer
    2. Convection can be shown by showing the movement of potassium manganate, which colours water purple, in a loop of water heated from the bottom

  3. Radiation

    1. Radiation is energy emitted by matter as infrared radiation in the electromagnetic spectrum
    2. Good & bad emitters & absorbers of radiation can be shown using a Leslie cube