Entropy may be defined as a thermodynamic quantity which represents the unavailability of thermal energy of any system for conversion into some mechanical work. It is also the randomness or the degree of disorder of the system.
Entropy increases when the system is more disordered. Entropy also increases when the temperature of the system is increased. The system with higher temperature means the particles have a high kinetic energy which in turn make the particles more dis order. And thus the entropy of the system increases.
