The First Law of Thermodynamics

The First Law of Thermodynamics states that energy cannot be created or destroyed; it can only change forms. In practical terms, this means that the total energy in a closed system remains constant. For example, when you burn fuel, the chemical energy stored in the fuel converts to heat and light energy, but the total energy before and after the process stays the same. This principle underlies many natural processes and technological applications, emphasizing the conservation of energy in everything from engines to ecosystems.