What does the first law of thermodynamics state about energy?

The first law of thermodynamics, often referred to as the law of energy conservation, states that energy can neither be created nor destroyed; it can only be transferred or converted from one form to another. This principle emphasizes that the total energy in a closed system remains constant over time, even as it may change forms, such as from kinetic energy to potential energy, or from heat energy to work.

In practical terms, this means that when energy is used for work, it doesn't disappear; rather, it is transformed into another type or transferred to another object or system. This understanding is fundamental in various fields, including physics and chemistry, where energy transformations are constantly occurring.

This principle highlights the significance of energy conservation in scientific theories and real-world applications. It provides a framework for understanding energy flows in natural and human-made systems, such as engines or ecosystems.