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Internal energy and kinetic theory
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Internal energy in the particle model

Internal energy in the particle model

Particle model showing solids, liquids and gases with random kinetic energy arrows and potential energy links

A system is the object or gas sample we choose to study. Its internal energy is the total random kinetic energy and potential energy of its particles.

Internal energy and kinetic theory Lesson

  1. A Level
  2. /Physics
  3. /Internal energy and kinetic theory

Step-by-step lessons on Edexcel A Level Physics Internal energy and kinetic theory. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons