Enthalpy & Entropy are two crucial factors in thermodynamics. Enthalpy reveals the total heat of a closed system. Its unit is KJ/mol. whereas Entropy provides an idea of the randomness of a closed system. The unit of entropy is KJ/K. Simply, Entropy is the Enthalpy difference of a system per Kelvin or Celcius. Enthalpy & Entropy have some kind of differences. Still, there is an important relationship between the two facts. Therefore, combinations of these factors are vital in describing a system.