A series of free GCSE/IGCSE Physics Notes and Lessons.
What is meant by internal energy?
What happens to internal energy during changes of state?
Internal Energy & Change of State
Internal energy is the total energy stores within a system. This is the total of the kinetic energy stores and potential energy stores of the particles within the system.
Describe the difference between these types of energy, and how energy is taken in or released when a substance changes state.
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