ENTROPY -

1. Transfer of energy takes place from high energy level to low energy level.
2. Rudolf clausius gave this term.
3. During it there is collision of particles, resulting in disorder or entropy.
4. As a result some energy is lost in the form of heat.
5. According to second law of thermo dynamics, any system when left to tends of increase entropy.
6. Thus entropy of system never decreases.
7. It increases for a irreversible process & remains constant for a reversible process.
8. In a biological system an increase of entropy results death of cell or organism.