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Understanding internal energy and heating

Particle model of matter • Internal energy and heat

Key concepts

What you'll likely be quizzed about

  • Internal energy is the sum of all the kinetic and potential energies of the particles in a substance.
  • At a microscopic level, it reflects the energy associated with the movement and arrangement of molecules.
  • Temperature is directly related to the average kinetic energy of these particles.

Flashcards

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What is heat capacity?

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Heat capacity is the amount of heat energy required to increase a substance’s temperature by one degree Celsius.

Key notes

Important points to keep in mind

Internal energy includes kinetic and potential energy of particles.

Conduction operates through direct particle contact.

Convection involves fluid movement for heat transfer.

Radiation enables heat transfer through electromagnetic waves.

Specific heat capacity determines heat energy absorption.

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