Entropy change quantifies the degree of disorder or randomness in a system as it undergoes a process, reflecting the second law of thermodynamics where entropy tends to increase in isolated systems. It is crucial in determining the feasibility and direction of thermodynamic processes, as systems naturally evolve towards states of higher entropy.

Entropy Change

Entropy change

degree of disorder

randomness in a system

The second law of thermodynamics states that in any natural thermodynamic process, the total entropy of a system and its surroundings always increases over time, leading to the concept of irreversibility. This law explains why energy transformations are not 100% efficient and why systems naturally progress towards thermal equilibrium, where entropy is maximized.

second law of thermodynamics

An isolated system is a physical system that does not interact with its surroundings, meaning it does not exchange energy or matter with the environment. This idealized concept is useful in thermodynamics and physics for understanding conservation laws, as it helps simplify the analysis of energy transformations within the system.

Relevant Degrees

Your Lessons