AP Chemistry Unit 6.3 Heat Transfer and Thermal Equilibrium

Heat Transfer and Thermal Equilibrium

  • Temperature: average kinetic energy of a substance
    • Reflects random motions of particles
    • A change in temperature indicates an energy change
  • Heat: involves the transfer of energy between two objects due to a temperature difference
    • Heat flows from hot (higher KE) to cold (lower KE)
    • When two objects at different temperatures are in contact, they will eventually reach the same intermediate temperature/thermal equilibrium: particles will have the same avg KE & temp
  • Decrease temperature = decrease avg KE of particles = decrease avg speed/velocity of particles
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