On the other hand, increasing the mass of a substance leads to an increase in entropy because more particles are made available.
![change in entropy equation change in entropy equation](https://i.stack.imgur.com/6Yeu0.png)
Chemical compounds with weak intermolecular forces between their atoms or molecules also have higher entropies than those joined by strong covalent bonds. This rise is explained by the fact that temperature increases the kinetic energy of particles thus allowing them to vibrate, separate, and move more in a disorganized manner. Temperature increases are also associated with a corresponding rise in entropy. For instance, the dissociation of one molecule of dinitrogen tetroxide into two molecules leads to the formation of two molecules of nitrogen dioxide, signifying a total increase in the number of molecules and an increase in entropy. 4 Chemical reactions where the total number of particles increase from the reactants to products are also associated with increased entropy. As solids and liquid dissolve, their particles are allowed to dissociate and spread within the solution thus increasing the entropy. Dissolving a solid or a liquid in a solvent also increases the entropy of a system. This increase is attributed to the dissemination of particles from each other with increasing distance between them. For example, when the physical state of a substance is changed from solid to liquid or from liquid to gas, the resultant entropy of the system increases. Several chemical processes and reactions have been shown to increase the entropy of a system. 1 Entropy can be defined as a thermodynamic measure that expresses the unattainability of a system’s thermal energy to be transformed into mechanical work, which is usually construed as the extent of disarray or arbitrariness in the system. 1 Conversely, the second law of thermodynamics proposes that the entropy often increases as time advances and that the universe tends to move towards increasing entropy, which is denoted by ΔS.
![change in entropy equation change in entropy equation](https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xODU5ODU0NC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0MzcxNzk3MX0.AZeRrL72yNqdbKyuVhw1Ppo4Qfr03z14PHsugLsUjp0/img.jpg)
The first law of thermodynamics states that energy cannot be created nor destroyed but is transformed from one state to another.