In the context of the first law of thermodynamics, what does the symbol 'E' represent?

In the context of the first law of thermodynamics, the symbol 'E' specifically represents energy. The first law states that energy cannot be created or destroyed, only transformed from one form to another. This principle is often summarized by the equation ΔE = Q - W, where ΔE is the change in internal energy of a system, Q is the heat added to the system, and W is the work done by the system. Here, energy is a fundamental concept that encompasses various forms such as kinetic, potential, thermal, and more. Understanding 'E' as energy is crucial for analyzing thermodynamic processes and ensuring the proper application of this law in physical science contexts.