Laws Of Thermodynamics - SS1 Biology Lesson Note

The Laws of Thermodynamics are fundamental principles in physics that also apply to biological systems. They govern the behavior of energy and its transformation within biological organisms and ecosystems. The Laws of Thermodynamics are as follows:

        i.            First Law of Thermodynamics (Law of Conservation of Energy): This law states that energy cannot be created or destroyed in an isolated system; it can only be transferred or transformed from one form to another. In the context of biology, this means that energy within a biological system is neither created nor destroyed but is instead converted from one form (e.g., chemical energy) to another (e.g., mechanical energy or heat).

      ii.            Second Law of Thermodynamics: This law states that in any conversion of energy from one form to another, there is always a decrease in the amount of useful energy. Some amount of energy will always be lost in the form of heat.